Perhaps you should try some spelling variations:
so sanh » do sanh
sanh ky » hanh ky, sang ky, nganh ky
cao hoi » co hoi, cao hoc, tao hoi
hieu ve » hieu va, hieu van
cac tuc » cac toc, cac tu, cac tac
tuc cac » tu cac, tich cac
ve cac » va cac, vien cac
dan va » doan va, dan ca, ban va
va cua » va chua, via cua, ca 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) or (cau hoi)). hieu ve cac tuc cac dan va cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh ky nang ((cao hoi) OR (cau hoi)). hieu ve cac tuc cac dan va cua tu.
• Adding a wildcard symbol may retrieve word variants: so sanh ky nang ((cao hoi) or (cau hoi)). hieu ve cac tuc cac dan va cua tu*.