Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » thien van, lieu va, hieu ve
van hanh » van thanh, ban hanh, van anh
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cau xuc » cam xuc, cau luc, cau truc
va hanh » va thanh, va danh, ban hanh
y nang » ky nang, ly nang, v nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang ma hoa. ((hieu van) OR (hieu va)) cau xuc ((va hanh) OR (van hanh)) dai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang ma hoa. ((hieu van) OR (hieu va)) cau xuc ((va hanh) or (van hanh)) dai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang ma hoa. ((hieu van) OR (hieu va)) cau xuc ((va hanh) or (van hanh)) dai cua triet*.