Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh vai » hanh vi, hanh va, hanh tai
ta_ lang » tai lang, tay lang, tham lang
ban hanh » ban hang
cam tuc » cam xuc, cam tu, nam thuc
vai cua » dai cua, hai cua, lai cua
tuc ban » thuc ban, truc ban, tu ban
cua tre » cua te, cuu tre, cua triet
hieu va » lieu va, hieu qua
hieu ve » hieu van
van hoi » van hoa, van hoc, van hoe

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sach ((_ lang) or (ta_ lang)) van hoi. ((hieu ve) or (hieu va)) cam tuc ban hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ((_ lang) OR (ta_ lang)) van hoi. ((hieu ve) OR (hieu va)) cam tuc ban hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ((_ lang) or (ta_ lang)) van hoi. ((hieu ve) or (hieu va)) cam tuc ban hanh vai cua tre*.