Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
cua tre » cua te, cuu tre, cua triet
lai cua » dai cua, hai cua, lai chau
hieu ve » hieu va
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
te sac » te sach, te cac, te san

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

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