Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cach tu » cach thuc
nang xa » nang x, lang xa, nang ma
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
xuc van » duc van, luc van, vuc van
cua tre » cua te, cua triet, dua tren
cuu 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 y) or (cach tu)) nang xa hoi. hieu qua cac xuc van hanh vi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach y) OR (cach tu)) nang xa hoi. hieu qua cac xuc van hanh vi ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te ((sach y) or (cach tu)) nang xa hoi. hieu qua cac xuc van hanh vi ((cua tre) or (cuu tre))*.