Perhaps you should try some spelling variations:
nang tai » hang tai, sang tai, nang cao
tang tai » hang tai, dung tai, sang tao
hanh dai » hanh tai, hanh dao, vanh dai
co sach » bo sach, cuon sach, hoc sach
hieu ve » hieu va, hieu van
luc van » luoc van, luu van, luc va
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac

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: co sach y ((nang tai) OR (tang tai)) hoa. hieu ve cau ((luc van) OR (duc van)) hanh dai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "co sach y ((nang tai) OR (tang tai)) hoa. hieu ve cau ((luc van) or (duc van)) hanh dai cua tre~".
• Adding a wildcard symbol may retrieve word variants: co sach y ((nang tai) OR (tang tai)) hoa. hieu ve cau ((luc van) or (duc van)) hanh dai cua tre*.