Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
sach thu » sach thue, sach thieu, sach tham
truc va » thuc va, thuc vat, trung va
vai cua » dai cua, hai cua, lai cua
sach ty » sach y, sach tu, xach tay
cao hoi » cau hoi, co hoi, cao hoc
xuc va » duc va, tuc va, luc va
va lam » van lam, va lap
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ty) OR (sach thu)) nang cao hoi. lieu va lam ((xuc va) or (truc va)) hanh vai cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ty) OR (sach thu)) nang cao hoi. lieu va lam ((xuc va) OR (truc va)) hanh vai cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ty) OR (sach thu)) nang cao hoi. lieu va lam ((xuc va) or (truc va)) hanh vai cua te".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ty) OR (sach thu)) nang cao hoi. lieu va lam ((xuc va) or (truc va)) hanh vai cua te*.