Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
dan tai » van tai, dan thi, han tai
den vai » den va, den vay, den vi
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
hieu va » lieu va, hieu qua
lang xa » lang ha, dang xay, lang van
ban ky » van ky
dan ky » van ky
va nam » van nam, ha nam, va nay

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((ban ky) or (dan ky)) lang xa hoi. hieu va nam thuc va ((den vai) or (dan tai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((ban ky) OR (dan ky)) lang xa hoi. hieu va nam thuc va ((den vai) OR (dan tai)) cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc ((ban ky) or (dan ky)) lang xa hoi. hieu va nam thuc va ((den vai) or (dan tai)) cuu tre*.