Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
chat xuc » chat huu, cam xuc, chao xu
ban hanh » ban hang
tu sach » thu sach, su sach, te sach
nang ma » tang ma, sang ma, nang cao
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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