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, do dai
dai ky » dan ky, dai ly, sai ky
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 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 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 ky nang x ho. hieu ve am thuc va dung hoi ((cua tre) or (cuu tre))*.