Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
lai cua » hai cua, lai chau, thai cua
tuc van » thuc van, truc van, tuc va
cam tuc » cam xuc, cam tu, nam thuc
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
ma hoi » mai hoi, xa hoi, ma hoa
sanh y » anh y, hanh y, sach y
ve cam » ve cham, ve cac, va cam
sinh y » sinh ly

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so ((sanh y) OR (sinh y)) tang ma hoi. hieu ve cam tuc van hanh ((lai cua) or (dai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((sanh y) OR (sinh y)) tang ma hoi. hieu ve cam tuc van hanh ((lai cua) OR (dai cua)) viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sanh y) OR (sinh y)) tang ma hoi. hieu ve cam tuc van hanh ((lai cua) or (dai cua)) viet*".