Perhaps you should try some spelling variations:
cao quoc » cao thuoc, han quoc, cua quoc
hanh che » han che, hanh he, hanh nghe
cac quoc » cac nuoc, cac cuoc, han quoc
va hanh » van hanh, va thanh, va danh
su tien » su kien, su hien, tu tieng
nang co » nang cao, nang doc, nang noi
co hoi » co hoc, co loi
tu san » thu san, tu ban, tu can
che su » che tu
tu sac » tu sach, tu cac, tu bac

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) OR (tu san)) ky nang co hoi. hieu qua ((cao quoc) or (cac quoc)) va hanh che su tien~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu san)) ky nang co hoi. hieu qua ((cao quoc) OR (cac quoc)) va hanh che su tien.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu san)) ky nang co hoi. hieu qua ((cao quoc) or (cac quoc)) va hanh che su tien".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu san)) ky nang co hoi. hieu qua ((cao quoc) or (cac quoc)) va hanh che su tien*.