Perhaps you should try some spelling variations:
sinh viec » sinh vien, dinh viec, ninh viet
tinh viec » tinh viet, dinh viec, tich viec
ky trang » ke trang, ky trong, ky tang
trang xa » trang va, trang ha, trong xa
hieu van » hieu va, thien van, lieu va
nam phuc » nam thuc, nang phuc, pham phuc
phuc may » hoc may, chua may, truc may
cua viet » ca viet, hoa viet, cua vat
tu bac » tu ban, tu bat, tu bai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu bac) or (tu cac)) ky trang xa hoi. hieu van nam phuc may ((tinh viec) OR (sinh viec)) cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu bac) OR (tu cac)) ky trang xa hoi. hieu van nam phuc may ((tinh viec) OR (sinh viec)) cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu bac) or (tu cac)) ky trang xa hoi. hieu van nam phuc may ((tinh viec) OR (sinh viec)) cua viet".
• Adding a wildcard symbol may retrieve word variants: ((tu bac) or (tu cac)) ky trang xa hoi. hieu van nam phuc may ((tinh viec) OR (sinh viec)) cua viet*.