Perhaps you should try some spelling variations:
cuu tre » cua tre, cau tren, cau treo
va dinh » van dinh, va kinh, va tinh
va danh » va dan, va hanh, dia danh
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
cao hoi » cau hoi, co hoi, cao hoc
va cam » va cham, va cac, va cao
tu cai » tu cac, tu can, tu bai
vi cuu » vi luu, vinh cuu
tu sai » tu bai, tu san, tu lai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sai) or (tu cai)) ky nang cao hoi. hieu va cam tuc ((va danh) OR (va dinh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sai) OR (tu cai)) ky nang cao hoi. hieu va cam tuc ((va danh) OR (va dinh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sai) or (tu cai)) ky nang cao hoi. hieu va cam tuc ((va danh) OR (va dinh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sai) or (tu cai)) ky nang cao hoi. hieu va cam tuc ((va danh) OR (va dinh)) vi cuu tre*.