Perhaps you should try some spelling variations:
dung thanh » duong thanh, dong thanh, dang thanh
dung than » dung thang, dung nhan, dung phan
hieu van » hieu va, thien van, lieu va
nang xa » nang x, lang xa, nang ma
van lam » van nam
lam tuc » lam thuoc, lam truoc, luat tuc
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su can, eu cac
su cao » cu cao, vu cao, su co

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