Perhaps you should try some spelling variations:
sinh viec » sinh vien, dinh viec, ninh viet
tinh viec » tinh viet, dinh viec, tich viec
va triet » va thiet, va trien, ve triet
hieu van » hieu va, thien van, lieu va
nam luc » nang luc, nhan luc, nam thuc
nang ma » tang ma, sang ma, mang may
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
tu sac » tu sach, tu cac, tu san

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