Perhaps you should try some spelling variations:
kho tang » cao tang
tai chay » toan chay, trai chan, lai chau
tang ma » mang may, tang van
tai chi » tai chinh
hieu ve » hieu va, hieu van
san kho » san khoa, san cho, lan kho
te san » te ban, ke san, tu san
ve cac » va cac, vien cac
ma hoi » mai hoi, xa hoi, ma hoa
loc va » hoc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te san kho tang ma hoi. hieu ve cac ((loc va) or (thuc vat)) hanh ((tai chay) OR (tai chi)) tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san kho tang ma hoi. hieu ve cac ((loc va) OR (thuc vat)) hanh ((tai chay) OR (tai chi)) tren*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te san kho tang ma hoi. hieu ve cac ((loc va) or (thuc vat)) hanh ((tai chay) OR (tai chi)) tren*".