Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
ban hanh » ban hang
cam cuc » cam xuc, cham cuu, pham cuc
cuc ban » cua ban, cac ban, cuu ban
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
x hoi » xa hoi, o hoi, x ho

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

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