Perhaps you should try some spelling variations:
thanh haii » thanh ha, thanh tai, thanh oai
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
song xa » song cua
sang xa » lang xa, sang ma, mang xa
can ky » van ky, dan ky, ban ky
tu can » tu ban, tu cac, thu canh

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 ((sang xa) or (song xa)) hoi. hieu van nam thuc va ((thanh haii) or (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu can ky ((sang xa) OR (song xa)) hoi. hieu van nam thuc va ((thanh haii) OR (thanh hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: tu can ky ((sang xa) or (song xa)) hoi. hieu van nam thuc va ((thanh haii) or (thanh hai)) cua tre*.