Perhaps you should try some spelling variations:
sach thue » sach thieu, sach tham, cach thuc
sach thu » sach thieu, sach tham, cach thuc
hanh dai » hanh tai, hanh dao, vanh dai
lang van » dang van, tang van, hoang van
thuc va » thuc vat, thuc dan, thuc day
thi van » thi lan, thi hanh, thi nang
van cam » van nam, van lam, van cau
van hoi » van hoa, van hoc, van hoe
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: tu ((sach thu) or (sach thue)) lang van hoi. thi van cam ((luc va) or (thuc va)) hanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach thu) OR (sach thue)) lang van hoi. thi van cam ((luc va) OR (thuc va)) hanh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach thu) or (sach thue)) lang van hoi. thi van cam ((luc va) or (thuc va)) hanh dai cua tre*.