Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
trang xa » trang va, trang ha, trang tai
doan van » doan va, hoang van, luan van
trong xa » trong xay, trong ca, trong xu
so sanh » do sanh
danh va » doanh va, hanh va, anh va
ve nham » ve nha, ve cham
thuc va » thuc vat, thuc dan, thuc day
sanh ty » sach ty, canh tay
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ty ((trang xa) or (trong xa)) hoi. hieu ve nham thuc va ((danh va) or (doan van)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ty ((trang xa) OR (trong xa)) hoi. hieu ve nham thuc va ((danh va) OR (doan van)) cua tre.
• Adding a wildcard symbol may retrieve word variants: so sanh ty ((trang xa) or (trong xa)) hoi. hieu ve nham thuc va ((danh va) or (doan van)) cua tre*.