Perhaps you should try some spelling variations:
thanh vai » thanh hai, thanh van, thanh tai
ban thanh » ban hanh, ban hang
tang van » dang van, hoang van, trong van
lang van » dang van, hoang van, giang van
hieu va » lieu va, hieu qua
vai cua » dai cua, hai cua, lai cua
dua ban » dia ban, cua ban, qua ban
cam dua » ca dua, cay dua, chay dua
tu sach » thu sach, su sach, te sach
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao

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 ty ((tang van) or (((lang xa) or (lang van)))) hoi. hieu va cam dua ban thanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((tang van) OR (((lang xa) OR (lang van)))) hoi. hieu va cam dua ban thanh vai cua tre*.