Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu van
hieu va » lieu va, hieu qua
truc va » thuc va, thuc vat, trung va
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach y nang cao hoi. ((hieu ve) or (hieu va)) cau truc va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cao hoi. ((hieu ve) OR (hieu va)) cau truc va hanh vi cua triet*.