Perhaps you should try some spelling variations:
thien van » thi van
dung thai » duong thai, dung tai, dung hai
hieu van » hieu va, lieu va, hieu ve
nang xa » nang x, lang xa, nang ma
lam tuc » lam thuoc, lam truoc, luat tuc
xa dung » xay dung, xa dong, va dung
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
su cac » tu cac, su cao, su can

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cac ky nang xa hoi. ((hieu van) OR (thien van)) lam tuc xa dung thai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang xa hoi. ((hieu van) OR (thien van)) lam tuc xa dung thai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang xa hoi. ((hieu van) OR (thien van)) lam tuc xa dung thai ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su cac ky nang xa hoi. ((hieu van) OR (thien van)) lam tuc xa dung thai ((cua tre) or (cuu tre))*.