Perhaps you should try some spelling variations:
hang cau » hang dau, hang ca, nhung cau
cuu tre » cua tre, cau tren, cau treo
cam luc » cam xuc, cau luc
danh vi » hanh vi, dinh vi, danh di
ky hang » ky nang, ly hang, ky dang
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
vi cuu » vi luu, vinh cuu
luc va » duc va, tuc va, loc va
te sac » te sach, te cac, te san
te cao » te bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sac) or (te cao)) ky hang cau hoi. ((hieu ve) or (lieu va)) cam luc va danh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te cao)) ky hang cau hoi. ((hieu ve) OR (lieu va)) cam luc va danh vi cuu tre.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te cao)) ky hang cau hoi. ((hieu ve) or (lieu va)) cam luc va danh vi cuu tre*.