Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cau trang » chu trang, cai trang, cau thang
trang va » tran van, hang va
van nang » van quang, van ban, van dong
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
so sach » so sanh, bo sach, co sach
hieu ve » hieu van
cao hoi » cau hoi, co hoi, cao hoc
v nang » va nang, vu nang, voi 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: so sach ((v nang) OR (van nang)) cao hoi. ((hieu ve) or (hieu va)) cau trang va hanh vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((v nang) OR (van nang)) cao hoi. ((hieu ve) OR (hieu va)) cau trang va hanh vi cua triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach ((v nang) OR (van nang)) cao hoi. ((hieu ve) or (hieu va)) cau trang va hanh vi cua triet*".