Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
toc sach » hoc sach, doc sach, thuoc sach
lang van » dang van, tang van, hoang van
truc van » truc va, thuc van, truc ban
van hanh » van thanh, ban hanh, van anh
van hoi » van hoa, van hoc, van hoe
hieu va » hieu qua
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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

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