Perhaps you should try some spelling variations:
cuc triet » cua triet, su triet, cac trieu
toc sach » hoc sach, doc sach, thuoc sach
thi nang » thi cong, ki nang, thi hanh
cac thuc » cach thuc, cac thu, can thuc
va thanh » gia thanh, ban thanh, va tinh
va hanh » van hanh, va danh, ban hanh
x hoi » xa hoi, o hoi, x ho

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) OR (toc sach)) thi nang x hoi. lieu va cac thuc ((va hanh) or (va thanh)) tai cuc triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) thi nang x hoi. lieu va cac thuc ((va hanh) OR (va thanh)) tai cuc triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) thi nang x hoi. lieu va cac thuc ((va hanh) or (va thanh)) tai cuc triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) thi nang x hoi. lieu va cac thuc ((va hanh) or (va thanh)) tai cuc triet*.