Perhaps you should try some spelling variations:
danh viet » anh viet, ninh viet, nang viet
dang xay » dang van, van xay
lang van » dang van, tang van, hoang van
viet cua » viec cua, viet ca, viet qua
van dau » phan dau
thuc va » thuc vat, thuc dan, thuc day
va danh » va dinh, va dan, va hanh
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cac ky ((dang xay) or (lang van)) hoi. thi ((van dau) OR (van dao)) thuc va danh viet cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cac ky ((dang xay) OR (lang van)) hoi. thi ((van dau) OR (van dao)) thuc va danh viet cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky ((dang xay) or (lang van)) hoi. thi ((van dau) OR (van dao)) thuc va danh viet cua tre".
• Adding a wildcard symbol may retrieve word variants: tu cac ky ((dang xay) or (lang van)) hoi. thi ((van dau) OR (van dao)) thuc va danh viet cua tre*.