Perhaps you should try some spelling variations:
tinh viec » tinh viet, dinh viec, sinh viec
hieu van » hieu va, thien van, lieu va
cua viet » ca viet, hoa viet, cua vat
mai hoi » mai khoi, dai hoi, lai hoi
nam luc » nhan luc, nam thuc, nam duoc
va tinh » may tinh
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky

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 ((mai hoi) or (xa hoi)). hieu van ((nam luc) or (nang luc)) va tinh viec cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((mai hoi) OR (xa hoi)). hieu van ((nam luc) OR (nang luc)) va tinh viec cua viet.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((mai hoi) or (xa hoi)). hieu van ((nam luc) or (nang luc)) va tinh viec cua viet*.