Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
sach thu » sach thue, sach thieu, sach tham
nang cau » nang cao, hang cau, nang dau
hieu van » hieu va, thien van, lieu va
van tham » van thanh, van tuan, van chat
hanh lai » hanh lam, hanh tai, thanh lap
sach ty » sach tu, xach tay, sach hay
va hanh » van hanh, va thanh, va danh
lai cua » dai cua, hai cua, lai chau
cua tre » cua te, cuu tre, cua triet

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((((sach ty) OR (sach y))) OR (sach thu)) nang cau hoi. hieu van tham nuoc va hanh lai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((((sach ty) OR (sach y))) or (sach thu)) nang cau hoi. hieu van tham nuoc va hanh lai cua tre~".
• Adding a wildcard symbol may retrieve word variants: te ((((sach ty) OR (sach y))) or (sach thu)) nang cau hoi. hieu van tham nuoc va hanh lai cua tre*.