Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
hanh lai » hanh lam, hanh tai, thanh lap
thuc dan » thuc hanh, hoc dan, thuc vat
thuc van » thuc vat, thuc hanh, hoc van
tang van » dang van, hoang van, trong van
hieu ve » hieu va, hieu van
van hoi » van hoa, van hoc, van hoe
thuc va » thuc vat, thuc day
lai cua » dai cua, hai cua, lai chau
do danh » do dinh, do sanh, dia danh
ve cam » ve cham, ve cac, va cam
danh y » anh y, hanh y, dan y
y tang » ky tang, 6 tang, 7 tang

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

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