Perhaps you should try some spelling variations:
danh thanh » dinh thanh, dang thanh, nhanh thanh
nang dai » nang dau, nang tai, lang dai
day thuc » dan thuc, cay thuc, dai thuc
ban hanh » ban hang
dai hoi » dai hoc, dai hai, dai moi
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
tu can » tu ban, tu cac, thu canh
can ky » van ky, dan ky, ban ky
va day » va dao, va dau, va dap

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu can ky nang dai hoi. lieu va day thuc ((danh thanh) or (ban hanh)) tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky nang dai hoi. lieu va day thuc ((danh thanh) OR (ban hanh)) tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu can ky nang dai hoi. lieu va day thuc ((danh thanh) or (ban hanh)) tai cua tre*.