Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
tay dang » tay dong, tay dung, tay lang
dang van » hoang van, hang va
hanh vai » hanh vi, hanh va, hanh tai
thuc van » thuc vat, thuc dan, thuc va
sach tay » xach tay, sach hay, sach nay
tuc van » truc van, tuc va, duc van
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
hieu ve » hieu van
van hoi » van hoa, van hoc, van hoe
cua tre » cua te, cuu tre, cua triet

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 tay dang van hoi. ((hieu ve) or (hieu va)) cam ((tuc van) or (thuc van)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach tay dang van hoi. ((hieu ve) OR (hieu va)) cam ((tuc van) OR (thuc van)) hanh vai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach tay dang van hoi. ((hieu ve) or (hieu va)) cam ((tuc van) or (thuc van)) hanh vai cua tre*.