Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
hanh tai » thanh tai, hang tai, han tai
sach thu » sach thue, sach thieu, sach tham
tai cuu » tai cuc, tai buu, tai cua
va hanh » van hanh, va thanh, va danh
va tham » van tham, va cham, va thanh
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
sach ty » sach y, sach tu, xach tay
co hoi » co hoc, co loi

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