Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
thai song » thai son, thai cong, thai dong
su triet » su viet, su tien, ve triet
hieu va » lieu va
lang xa » lang ha, dang xay, lang van
song va » song van, dong va, song xa
va hanh » van hanh, va thanh, va danh
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
te sac » te sach, te cac, te san

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky lang xa hoi. ((hieu va) or (hieu qua)) thai song va hanh vi ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. ((hieu va) OR (hieu qua)) thai song va hanh vi ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky lang xa hoi. ((hieu va) or (hieu qua)) thai song va hanh vi ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((hieu va) or (hieu qua)) thai song va hanh vi ((cua triet) OR (su triet))*.