Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, doanh van, dang van
nang noi » nang doc
cam thuc » am thuc, nam thuc, cam thu
danh va » doanh va, hanh va, anh va
sang ky » sang kyo, dang ky, tang ky
noi hoi » noi doi, doi hoi, hoi hoi
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
san ky » van ky, dan ky, ban ky
va cam » va cham, va cac, va cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((san ky) OR (sang ky)) nang noi hoi. hieu va cam thuc va ((danh vai) OR (danh va)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((san ky) OR (sang ky)) nang noi hoi. hieu va cam thuc va ((danh vai) or (danh va)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu ((san ky) OR (sang ky)) nang noi hoi. hieu va cam thuc va ((danh vai) or (danh va)) cua triet*.