Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hanh lai » hanh lam, hanh tai, thanh lap
lang van » dang van, tang van, hoang van
truc va » thuc va, thuc vat, trung va
lai cua » dai cua, hai cua, lai chau
qua cam » qua cham, qua cac, qua ca
cua tre » cua te, cuu tre, cua triet
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach y ((nang x) or (lang van)) hoi. hieu qua cam ((luc va) or (truc va)) hanh lai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach y ((nang x) OR (lang van)) hoi. hieu qua cam ((luc va) OR (truc va)) hanh lai cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach y ((nang x) or (lang van)) hoi. hieu qua cam ((luc va) or (truc va)) hanh lai cua tre*.