Perhaps you should try some spelling variations:
thai son » thai den, thai do, thai hoc
ky dang » ky nang, ky danh
dang xa » dang xay, lang xa, dang ha
hieu va » hieu qua
va hanh » van hanh, va thanh, va danh
te cac » tu cac, ve cac, te cao
son va » song va, son la, lon va
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: te cac ky dang xa hoi. ((hieu va) or (lieu va)) thai son va hanh vi ((cua te) OR (cua tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te cac ky dang xa hoi. ((hieu va) OR (lieu va)) thai son va hanh vi ((cua te) OR (cua tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te cac ky dang xa hoi. ((hieu va) or (lieu va)) thai son va hanh vi ((cua te) OR (cua tu))".
• Adding a wildcard symbol may retrieve word variants: te cac ky dang xa hoi. ((hieu va) or (lieu va)) thai son va hanh vi ((cua te) OR (cua tu))*.