Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
mai khoi » mai khoa, tai khoa, cac khoi
va hanh » van hanh, va thanh, va danh
cau xuc » cam xuc, cau luc, cau truc
tu sach » thu sach, su sach, te sach
van cau » van dau, van hau, van chat
lai hoi » dai hoi, lai hoa, lai roi
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 ((lai hoi) or (mai khoi)). hieu van cau xuc ((va hanh) or (gia thanh)) vi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ((lai hoi) OR (mai khoi)). hieu van cau xuc ((va hanh) OR (gia thanh)) vi cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ((lai hoi) or (mai khoi)). hieu van cau xuc ((va hanh) or (gia thanh)) vi cua triet*.