Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
ban hanh » ban hang
cua tre » cua te, cuu tre, cua triet
tai cua » thai cua, tai cuc, tri cua
duc ban » duc tan, duc van, dua ban
cac duc » cac du, cao duc, cac dac
hieu ve » hieu va, 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 (lieu va)) cac duc ban hanh tai cua 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 (lieu va)) cac duc ban hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sac) or (tu can)) ky nang o lai. ((hieu ve) or (lieu va)) cac duc ban hanh tai cua tre*.