Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh lai » hanh lam, hanh tai, thanh lap
thuc van » thuc vat, thuc dan, thuc va
truc van » truc va, truc ban, truc dan
lai cua » dai cua, hai cua, lai chau
tang ma » mang may, tang van
hieu ve » hieu va, hieu van
sanh y » anh y, hanh y, sach y
ve cam » ve cham, ve cac, va cam
ma hoi » mai hoi, xa hoi, ma hoa
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 ((truc van) or (thuc van)) hanh lai 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 ((truc van) OR (thuc van)) hanh lai 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 ((truc van) or (thuc van)) hanh lai cua viet*".