Perhaps you should try some spelling variations:
sinh viec » sinh vien, dinh viec, dinh viet
ninh viet » sinh vien, anh viet
tinh viec » tinh viet, dinh viec, tich viec
su viet » so viet
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
nam luc » nang luc, nhan luc, nam thuc
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
va nam » van nam, ha nam, va nay
ma hoi » mai hoi, xa hoi, ma hoa
luc va » duc va, tuc va, loc va

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 ma hoi. hieu va nam luc va ((tinh viec) or (((sinh viec) OR (ninh viet)))) su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ma hoi. hieu va nam luc va ((tinh viec) OR (((sinh viec) OR (ninh viet)))) su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ma hoi. hieu va nam luc va ((tinh viec) or (((sinh viec) OR (ninh viet)))) su viet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ma hoi. hieu va nam luc va ((tinh viec) or (((sinh viec) OR (ninh viet)))) su viet*.