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

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) or (tu cac)) ky nang xa hoi. hieu van nam tuc xa dung thai ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su cac) OR (tu cac)) ky nang xa hoi. hieu van nam tuc xa dung thai ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((su cac) or (tu cac)) ky nang xa hoi. hieu van nam tuc xa dung thai ((cua tre) or (cuu tre))*.