Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
vat danh » va danh, van danh, luat danh
danh dai » danh dau, danh di, danh sai
su triet » su viet, ve triet
hieu ve » hieu va
su tien » su kien, su hien, tu tieng
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
x hoi » xa hoi, o hoi, x ho
thuc » thu

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 vat danh dai ((su triet) OR (su tien))~.
• 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 vat danh dai ((su triet) OR (su tien)).
• 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 vat danh dai ((su triet) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang x hoi. ((hieu ve) or (hieu van)) am thuc vat danh dai ((su triet) OR (su tien))*.