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, te cao, de cac
ve cac » va cac, vien cac
son va » song va, son la, lon va
vi cua » vai cua, di cua
cua te » cua tu

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) OR (ve cac)) ky dang xa hoi. ((hieu va) or (lieu va)) thai son va hanh vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te cac) OR (ve cac)) ky dang xa hoi. ((hieu va) OR (lieu va)) thai son va hanh vi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te cac) OR (ve cac)) ky dang xa hoi. ((hieu va) or (lieu va)) thai son va hanh vi cua te".
• Adding a wildcard symbol may retrieve word variants: ((te cac) OR (ve cac)) ky dang xa hoi. ((hieu va) or (lieu va)) thai son va hanh vi cua te*.