Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
van hanh » van thanh, ban hanh, van anh
cuc tre » duc tre, cua tre, cuu tre
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
hieu ve » hieu van
nang o » nang co, nang ho, nang ro
tu can » tu ban, tu cac, thu canh
tu sac » tu sach, tu cac, tu san
o lai » o lao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sac) or (tu can)) ky nang o lai. ((hieu ve) or (hieu va)) cam xuc van hanh tai cuc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu can)) ky nang o lai. ((hieu ve) OR (hieu va)) cam xuc van hanh tai cuc tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu can)) ky nang o lai. ((hieu ve) or (hieu va)) cam xuc van hanh tai cuc tre*.