Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh dan » thanh san, thanh van, thanh dat
hieu van » hieu va, thien van, lieu va
nam duoc » nam thuoc, da duoc, dat duoc
su sach » so sach, vu sach
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
lam duc » lam duoc, pham duc, lam dung
cua tre » cuu tre, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
cua te » cua tu

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 lang xa hoi. hieu van ((lam duc) or (nam duoc)) ban thanh dan ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky lang xa hoi. hieu van ((lam duc) OR (nam duoc)) ban thanh dan ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: su sach ky lang xa hoi. hieu van ((lam duc) or (nam duoc)) ban thanh dan ((cua tre) or (cua te))*.