Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
tu nang » tru nang, tu nong, tu nano
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va cham » va chat, va tham
tuc van » thuc van, truc van, tuc va
hang vi » hanh vi, hang di, khang voi
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nang xa hoi. hieu va cham tuc van ((hang vi) or (hang va)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang xa hoi. hieu va cham tuc van ((hang vi) OR (hang va)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang xa hoi. hieu va cham tuc van ((hang vi) or (hang va)) cuu tre*.