Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van chat » cao chat
chat xuc » chat huu, cam xuc, chao xu
cuu tre » cau tren, cau treo
va dinh » van dinh, va kinh, va tinh
cua tre » cua te, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
nang ma » tang ma, sang ma, nang cao
su cac » tu cac, su cao, su can
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: su cac ky nang ma hoi. hieu van chat xuc ((va hanh) or (va dinh)) thai ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cac ky nang ma hoi. hieu van chat xuc ((va hanh) OR (va dinh)) thai ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su cac ky nang ma hoi. hieu van chat xuc ((va hanh) or (va dinh)) thai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su cac ky nang ma hoi. hieu van chat xuc ((va hanh) or (va dinh)) thai ((cua tre) OR (cuu tre))*.