Perhaps you should try some spelling variations:
nhung cau » chung cu, nhung bai, nhu cau
toc sach » hoc sach, doc sach, thuoc sach
ty nhung » tay nhung, tu nhung, ky nhung
va triet » va thiet, va trien, ve triet
sach ty » sach y, sach tu, sach thu
qua cac » cua cac
danh de » hanh de, dan de, dang de
xuc va » tuc va, luc va, xac va
de va » de van, te va, ke va

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ty nhung cau hoi. hieu qua cac ((xuc va) or (duc va)) danh de va triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ty nhung cau hoi. hieu qua cac ((xuc va) OR (duc va)) danh de va triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ty nhung cau hoi. hieu qua cac ((xuc va) or (duc va)) danh de va triet*.