Perhaps you should try some spelling variations:
nang dai » nang dau, nang tai, lang dai
thuc xay » tuc xay, thuat xay, truoc xay
thuc day » thuc dan, thuc vat
hanh tai » thanh tai, hang tai, han tai
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 xay) OR (thuc day)) hanh tai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu can ky nang dai hoi. lieu va day ((thuc xay) OR (thuc day)) hanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu can ky nang dai hoi. lieu va day ((thuc xay) OR (thuc day)) hanh tai cua tre*.