Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
nham thuc » nhan thuc, nam thuc, nham thu
hang tai » hang va, dung tai
hang dau » hang va
hieu van » hieu va, thien van, lieu va
van nham » van nam, van nhan, van tham
tang van » dang van, hoang van, trong van
thuc va » thuc vat, thuc dan, thuc day
tang ma » mang may
te sach » toc sach

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y ((tang ma) OR (tang van)) hoi. hieu van nham thuc va ((hang dau) or (hang tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((tang ma) OR (tang van)) hoi. hieu van nham thuc va ((hang dau) OR (hang tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((tang ma) OR (tang van)) hoi. hieu van nham thuc va ((hang dau) or (hang tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach y ((tang ma) OR (tang van)) hoi. hieu van nham thuc va ((hang dau) or (hang tai)) cua triet*.