Perhaps you should try some spelling variations:
dung hoi » duong hoi, dung hoai, dung thoi
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va dung » van dung, va duong, vat dung
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
so dai » si dai, co dai, so dac
do dai » co dai
ve am » va am

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((so dai) OR (do dai)) ky nang x ho. hieu ve am thuc va dung hoi ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((so dai) OR (do dai)) ky nang x ho. hieu ve am thuc va dung hoi ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so dai) OR (do dai)) ky nang x ho. hieu ve am thuc va dung hoi ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: ((so dai) OR (do dai)) ky nang x ho. hieu ve am thuc va dung hoi ((cua tre) or (cuu tre))*.