Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, lieu vien
cac nuoc » cap nuoc, hoc nuoc, cua nuoc
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
cao hoi » cau hoi, co hoi, cao hoc
cac xuc » cam xuc, chat xuc, cac cuoc
dan co » dan cho, dang co, danh co
co cua » con cua, ca cua, cong cua
cua tu » cua tuc, cua su, cua cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh ky nang cao hoi. hieu vien ((cac xuc) or (((cac nuoc) OR (dat nuoc)))) cac dan co cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky nang cao hoi. hieu vien ((cac xuc) OR (((cac nuoc) OR (dat nuoc)))) cac dan co cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh ky nang cao hoi. hieu vien ((cac xuc) or (((cac nuoc) OR (dat nuoc)))) cac dan co cua tu".
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang cao hoi. hieu vien ((cac xuc) or (((cac nuoc) OR (dat nuoc)))) cac dan co cua tu*.