Perhaps you should try some spelling variations:
thien van » thi van
hieu van » hieu va, lieu va, hieu ve
hanh vai » hanh vi, hanh va, hanh tai
thu tai » tu tai, tru tai, thu hai
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
tai ky » thai ky, trai ky, sai ky
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu tai ky nang xa hoi. ((hieu van) OR (thien van)) pham duc va hanh vai ((cua te) or (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu tai ky nang xa hoi. ((hieu van) OR (thien van)) pham duc va hanh vai ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu tai ky nang xa hoi. ((hieu van) OR (thien van)) pham duc va hanh vai ((cua te) or (cua tu))".
• Adding a wildcard symbol may retrieve word variants: thu tai ky nang xa hoi. ((hieu van) OR (thien van)) pham duc va hanh vai ((cua te) or (cua tu))*.