Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
cac lop » cac loai
va hanh » van hanh, va thanh, va danh
vai cuu » vai cua
cuu tre » cua tre, cau tren, cau treo
tu can » tu cac, thu canh
tu ban » thu ban, te ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu can) or (tu ban)) ky nang cao hoi. hieu va ((cac lop) or (cac hop)) va hanh vai cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu can) OR (tu ban)) ky nang cao hoi. hieu va ((cac lop) OR (cac hop)) va hanh vai cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((tu can) or (tu ban)) ky nang cao hoi. hieu va ((cac lop) or (cac hop)) va hanh vai cuu tre*.