Perhaps you should try some spelling variations:
hieu vien » hieu viec, thieu nien, hieu tieng
hieu hien » bieu hien, dieu hien, chieu chien
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
cac cao » cac co, ca cao, bac cao
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
vi cua » vai cua, di cua
cua te » cua tu
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 vien) or (hieu hien)) cac cao ((van hanh) OR (ban hanh)) vi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang x hoi. ((hieu vien) OR (hieu hien)) cac cao ((van hanh) OR (ban hanh)) vi cua te*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang x hoi. ((hieu vien) or (hieu hien)) cac cao ((van hanh) OR (ban hanh)) vi cua te*".