Perhaps you should try some spelling variations:
sach tham » sach nha
thien van » thi van
chat truc » cau truc, chat xuc
sach thu » sach thue, sach thieu, cach thuc
hang cau » hang dau, hang ca, nhung cau
van chat » cao chat
hanh dai » hanh tai, hanh dao, vanh dai
cua viet » ca viet, hoa viet, cua vat
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach thu) or (sach tham)) hang cau hoi. thien van chat truc va hanh dai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach tham)) hang cau hoi. thien van chat truc va hanh dai cua viet.
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) or (sach tham)) hang cau hoi. thien van chat truc va hanh dai cua viet*.