1 (wiktionary) 2 (vi.wikipedia) 3 (en.wikipedia) 4 (glosbe)
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COMPOUNDS
biến cố 
event, happening, occurrence
bất cứ khi nào whenever (something happens)
bằng không if not, else, otherwise, as if nothing had happened
bằng thừa in vain, pointless, as if nothing had happened
bối cảnh lịch sử historical event, happening
chuyện ngày hôm nay what happened today
chuẩn bị để to prepare (to have sth happen)
chưa not yet, yet (to happen)
chưa hề vẩy ra trước đây to have never happened before
chưa kịp to not yet be able to, not be able to do (before sth else happens)
chưa not yet, yet (to happen)
chắc khó unlikely (to happen)
có nơi there is, there are places (where something happens)
có thể xảy ra can occur, can happen
cảnh huống happening, situation, plight
diễn biến development, event, happening; to evolve unfold, happen
diễn biến lịch sử historical happenings
diễn ra to take place, occur, happen, unfold
diễn ra như cũ to happen just like before
gặp trường hợp như vậy if this happens, in this case
hồi time (when something happened), when
khi occasion, time (when something happens), when, at the time of, if
khi đó when that happens, when that occurs, then
không có gì xảy ra nothing happened
không để to not allow, not let sth happen
kể từ ngay from the day (something happened)
kể từ sau since (something happened)
làm to do, work, make, function as, serve; to cause something to happen
mệnh một happen to die
như không as if nothing had happened
những việc xảy ra happenings, events, goings-on
ra sao thì ra whatever happens, happens
rất dễ xảy ra very likely to happen
sau khi following; after (something happens)
sảy to happen, occur, take place
sắp sửa xảy ra about to happen
sẽ xảy ra will happen, will take place
sịch to stir (move suddenly) to happen suddenly
sự kiện quan trọng important happenings, events, fact
thì ra actually, it just happens that
thì sao what about, how about, then what (will happen)?
trước ngày before (the day something happens)
tái diễn to happen again, re-occur
vì lý do gì khiến this has caused (something to happen)
vừa mới recently, just (happened)
vừa quá recent, just happened
vừa xảy ra to have just occurred, just happened
xảy to happen
xảy ra to happen, occur
xảy ra rất thường to happen a lot, take place often
xẩy to happen, occur, arise
xẩy ra to happen, occur, arise
đang lúc ăn thì while eating (something happened)
đã xảy ra to have happened, have occurred, have taken place
đúng vào lúc mà at the precise moment that (something happened)
đầu tiên kể từ khi since (the time something happened)
biến cố event, happening, occurrence bất cứ khi nào whenever (something happens) bằng không if not, else, otherwise, as if nothing had happened bằng thừa in vain, pointless, as if nothing had happened bối cảnh lịch sử historical event, happening chuyện ngày hôm nay what happened today chuẩn bị để to prepare (to have sth happen) chưa not yet, yet (to happen) chưa hề vẩy ra trước đây to have never happened before chưa kịp to not yet be able to, not be able to do (before sth else happens) chưa not yet, yet (to happen) chắc khó unlikely (to happen) có nơi there is, there are places (where something happens) có thể xảy ra can occur, can happen cảnh huống happening, situation, plight diễn biến development, event, happening; to evolve unfold, happen diễn biến lịch sử historical happenings diễn ra to take place, occur, happen, unfold diễn ra như cũ to happen just like before gặp trường hợp như vậy if this happens, in this case hồi time (when something happened), when khi occasion, time (when something happens), when, at the time of, if khi đó when that happens, when that occurs, then không có gì xảy ra nothing happened không để to not allow, not let sth happen kể từ ngay from the day (something happened) kể từ sau since (something happened) làm to do, work, make, function as, serve; to cause something to happen mệnh một happen to die như không as if nothing had happened những việc xảy ra happenings, events, goings-on ra sao thì ra whatever happens, happens rất dễ xảy ra very likely to happen sau khi following; after (something happens) sảy to happen, occur, take place sắp sửa xảy ra about to happen sẽ xảy ra will happen, will take place sịch to stir (move suddenly) to happen suddenly sự kiện quan trọng important happenings, events, fact thì ra actually, it just happens that thì sao what about, how about, then what (will happen)? trước ngày before (the day something happens) tái diễn to happen again, re-occur vì lý do gì khiến this has caused (something to happen) vừa mới recently, just (happened) vừa quá recent, just happened vừa xảy ra to have just occurred, just happened xảy to happen xảy ra to happen, occur xảy ra rất thường to happen a lot, take place often xẩy to happen, occur, arise xẩy ra to happen, occur, arise đang lúc ăn thì while eating (something happened) đã xảy ra to have happened, have occurred, have taken place đúng vào lúc mà at the precise moment that (something happened) đầu tiên kể từ khi since (the time something happened)