Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh vai » thanh van, thanh tai, thanh oai
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
dua ban » dia ban, cua ban, qua ban
van lam » van nam
tang ma » mang may, tang van
ky tang » ky nang, ky dang, kho tang

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 ky tang ma hoa. hieu van lam ((dua ban) or (qua quan)) ((thanh vai) or (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang ma hoa. hieu van lam ((dua ban) OR (qua quan)) ((thanh vai) OR (thanh hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang ma hoa. hieu van lam ((dua ban) or (qua quan)) ((thanh vai) or (thanh hai)) cua tre*.