Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
ban thanh » ban hanh, ban hang
su sach » vu sach
van cua » vang cua, ban cua, dan cua
lam duc » lam duoc, nam duoc, lam dung
cua tre » cua te, cuu tre, cua triet
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
so sach » so sanh, bo sach, co sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (so sach)) ky tang xa hoi. lieu va ((lam duc) or (pham duc)) ban thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky tang xa hoi. lieu va ((lam duc) OR (pham duc)) ban thanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky tang xa hoi. lieu va ((lam duc) or (pham duc)) ban thanh van cua tre*.