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