Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh van » thanh san, thanh toan, thanh phan
van tham » van thanh, van tuan, van chat
van phan » van phong, van thanh, luan phan
cua tre » cua te, cua triet, dua tren
su sach » so sach, vu sach
duc ban » duc tan, duc van, dua ban
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
cuu tre » cau tren, cau treo

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 ky nang xa hoi. thien ((van tham) or (van phan)) duc ban thanh van ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. thien ((van tham) OR (van phan)) duc ban thanh van ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. thien ((van tham) or (van phan)) duc ban thanh van ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. thien ((van tham) or (van phan)) duc ban thanh van ((cua tre) OR (cuu tre))*.