Perhaps you should try some spelling variations:
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
dang thi » hoang thi, dang khoi
dan vai » dan va, dan tai, dan vat
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cua tre, cau tren, cau treo
lang ha » long ha
lang xa » dang xay, lang van
san ky » sang ky, van ky, dan ky

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

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