Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
hieu vien » hieu hien, thieu nien, hieu tieng
va danh » va dinh, va hanh, dia danh
nang ma » tang ma, sang ma, nang cao
cac luc » cau luc, coc luc, cac nuoc
co cua » con cua, ca cua, cong cua
va dan » ca dan, va dao, va dau
tu san » thu san, tu ban, tu can
san ky » sang ky, van ky, dan ky
ma hoi » mai hoi, xa hoi, ma hoa
cua su » qua su

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

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