Perhaps you should try some spelling variations:
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, hieu ve
chat xuc » chat huu, cam xuc, chao xu
thai cua » than cua, tai cuc, tri cua
mai hoi » mai khoi, dai hoi, lai hoi
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
cua tre » cua te, cuu tre, cua triet
su cac » tu cac, su cao, su can

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