Perhaps you should try some spelling variations:
sinh viec » sinh vien, dinh viec, ninh viet
tinh viec » tinh viet, dinh viec, tich viec
su triet » su viet, su tien, ve triet
hieu van » hieu va, thien van, lieu va
nang ma » tang ma, nang cao, mang may
nam loc » nam lo, nam moc, nam soc
sang ma » tang ma, sang tao, mang may
san ky » sang ky, van ky, dan ky
loc va » hoc va, luc va
tu san » thu san, tu ban, tu can

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