Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
cac thuc » cach thuc, cac thu, can thuc
thi cong » tai cong, thien cong
thi nang » ki nang, thi hanh
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((thi nang) or (thi cong)) xa hoi. lieu va cac thuc va hanh vai ((cua triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((thi nang) OR (thi cong)) xa hoi. lieu va cac thuc va hanh vai ((cua triet) OR (su triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((thi nang) or (thi cong)) xa hoi. lieu va cac thuc va hanh vai ((cua triet) OR (su triet))".
• Adding a wildcard symbol may retrieve word variants: te sach ((thi nang) or (thi cong)) xa hoi. lieu va cac thuc va hanh vai ((cua triet) OR (su triet))*.