Perhaps you should try some spelling variations:
hieu vien » hieu hien, thieu nien, hieu tieng
hieu viec » nhieu viec, hieu ve, sieu viet
danh con » danh co, dang cong, danh ngon
con cua » cong cua, co cua, dong cua
va danh » va dinh, va dan, va hanh
nang ma » tang ma, sang ma, nang cao
cac luc » cau luc, coc luc, cac nuoc
tu san » thu san, tu can, vu san
luc va » duc va, tuc va, loc va
ma hoi » mai hoi, xa hoi, ma hoa
tu ban » thu ban, te ban
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) OR (tu ban)) ky nang ma hoi. ((hieu vien) or (hieu viec)) cac luc va danh con cua su~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu ban)) ky nang ma hoi. ((hieu vien) OR (hieu viec)) cac luc va danh con cua su.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu san) OR (tu ban)) ky nang ma hoi. ((hieu vien) or (hieu viec)) cac luc va danh con cua su".
• Adding a wildcard symbol may retrieve word variants: ((tu san) OR (tu ban)) ky nang ma hoi. ((hieu vien) or (hieu viec)) cac luc va danh con cua su*.