Perhaps you should try some spelling variations:
cuu tre » cua tre, cau tren, cau treo
danh vi » hanh vi, dinh vi, danh di
thuc va » thuc vat, thuc dan, thuc day
hieu va » lieu va, hieu qua
cao hoi » cau hoi, co hoi, cao hoc
va cam » va cham, va cac, va cao
tuc va » truc va, tuc xa, duc va
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) OR (thuc va)) danh 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) OR (thuc va)) danh 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) OR (thuc va)) danh 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) OR (thuc va)) danh vi cuu tre*.