Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
danh vai » danh sai, doanh van, dang van
cam thuc » am thuc, nam thuc, cam thu
noi hoi » noi doi, doi hoi, noi hai
danh va » doanh va, hanh va, anh va
hoi hoi » hoi hoc, hoc hoi, hoi doi
hieu va » lieu va, hieu qua
thuc va » thuc vat, thuc dan, thuc day
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai 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 sac ky nang ((noi hoi) OR (hoi 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 sac ky nang ((noi hoi) OR (hoi hoi)). hieu va cam thuc va ((danh vai) or (danh va)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((noi hoi) OR (hoi hoi)). hieu va cam thuc va ((danh vai) or (danh va)) cua triet*.