Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
danh dau » lanh dao, hang dau, danh tu
hieu van » hieu va, thien van, lieu va
danh dai » danh di, danh sai, vanh dai
hieu ve » hieu va
thuc va » thuc vat, thuc dan, thuc day
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ky nang x hoi. ((hieu ve) or (hieu van)) am thuc va ((danh dai) OR (danh dau)) su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. ((hieu ve) OR (hieu van)) am thuc va ((danh dai) OR (danh dau)) su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x hoi. ((hieu ve) or (hieu van)) am thuc va ((danh dai) OR (danh dau)) su triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((hieu ve) or (hieu van)) am thuc va ((danh dai) OR (danh dau)) su triet*.