HSK 3.0 11000 CHINESE WORDS
ENGLISH 6000 THEME WORDS
OXFORD 5000 CORE WORDS
TANAKA 6000 CORE WORDS
mấy thế kỷ trước 
a few centuries before, earlier
[ mấy ] : how much, how many, what, how?; several, some, a few; and, with
[ thế ] : (1) manner, way, fashion, position, situation, posture; (2) so, thus, like that, such
[ kỷ ] : (1) order, discipline; (2) small table, bench; (3) self; (4) to write, record; (5) cycle, era; (6) 6th cycle of the twelve years of the Chinese zodiac
[ trước ] : before, in front, previously; faced with, in the face of, ahead of
mấy thế kỷ trước a few centuries before, earlier [ thế ] : (1) manner, way, fashion, position, situation, posture; (2) so, thus, like that, such
[ kỷ ] : (1) order, discipline; (2) small table, bench; (3) self; (4) to write, record; (5) cycle, era; (6) 6th cycle of the twelve years of the Chinese zodiac
[ trước ] : before, in front, previously; faced with, in the face of, ahead of