Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
thanh vai » thanh hai, thanh van, thanh tai
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
dua ban » dia ban, cua ban, qua ban
cua tre » cuu tre, cua triet, dua tren
van lam » van nam
lam dua » lam cua, lam duoc, lam dung
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang
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: ((tu sach) or (toc sach)) ky tang ma hoa. hieu van lam dua ban thanh vai ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky tang ma hoa. hieu van lam dua ban thanh vai ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky tang ma hoa. hieu van lam dua ban thanh vai ((cua tre) or (cua te))*.