1 (wiktionary) 2 (vi.wikipedia) 3 (en.wikipedia) 4 (glosbe)
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COMPOUNDS
bảo quản 
to maintain, keep (in good condition), preserve, store
bảo toàn to keep whole, intact, preserve
bảo tồn to preserve, conserve, keep, maintain
bảo tồn bảo tàng to preserve, care for and display
bảo vệ insurance, protection, defense; to preserve, guard, defend, protect
bảo vệ văn hóa to preserve one’s culture
duy hộ to preserve
duy trì to maintain, keep (open), preserve
dưỡng mục preserve one’s eyesight
dưỡng thần preserve one’s mind
gin to keep, preserve
gin giữ to keep, preserve
giữ an ninh to preserve the peace, safety
giữ gìn to preserve, guard, maintain
giữ gìn di sản to preserve one’s heritage
giữ lấy to keep, preserve
giữ nguyên to preserve, keep intact, keep the same
gìn to keep, preserve
kẹo mứt preserves, confections
muối dưa preserve vegetables in salt
mứt jam, sugar-coated fruit, sugar, preserved fruit
mứt sen sugar-preserved lotus seeds
ngâm giấm preserve in vinegar
trì thủ to preserve, guard
tưu trữ to preserve, save
tồn trữ to keep, preserve, conserve, store
ô môi apricots (or other small fruits) preserved in salt, licorice,
độ trì assist and preserve
ướp to preserve, embalm, perfume
bảo quản to maintain, keep (in good condition), preserve, store bảo toàn to keep whole, intact, preserve bảo tồn to preserve, conserve, keep, maintain bảo tồn bảo tàng to preserve, care for and display bảo vệ insurance, protection, defense; to preserve, guard, defend, protect bảo vệ văn hóa to preserve one’s culture duy hộ to preserve duy trì to maintain, keep (open), preserve dưỡng mục preserve one’s eyesight dưỡng thần preserve one’s mind gin to keep, preserve gin giữ to keep, preserve giữ an ninh to preserve the peace, safety giữ gìn to preserve, guard, maintain giữ gìn di sản to preserve one’s heritage giữ lấy to keep, preserve giữ nguyên to preserve, keep intact, keep the same gìn to keep, preserve kẹo mứt preserves, confections muối dưa preserve vegetables in salt mứt jam, sugar-coated fruit, sugar, preserved fruit mứt sen sugar-preserved lotus seeds ngâm giấm preserve in vinegar trì thủ to preserve, guard tưu trữ to preserve, save tồn trữ to keep, preserve, conserve, store ô môi apricots (or other small fruits) preserved in salt, licorice, độ trì assist and preserve ướp to preserve, embalm, perfume