Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
tinh viet » trinh viet, ninh viet, dinh viet
tinh viec » dinh viec, sinh viec, tich viec
hieu van » hieu va, thien van, lieu va
nam luc » nang luc, nhan luc, nam thuc
lai hoi » dai hoi, lai hoa, lai roi
mai hoi » mai khoi, dai hoi, mai doi
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 ((mai hoi) or (lai hoi)). hieu van nam luc va ((tinh viec) OR (tinh viet)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky nang ((mai hoi) OR (lai hoi)). hieu van nam luc va ((tinh viec) OR (tinh viet)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((mai hoi) or (lai hoi)). hieu van nam luc va ((tinh viec) OR (tinh viet)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((mai hoi) or (lai hoi)). hieu van nam luc va ((tinh viec) OR (tinh viet)) cua triet*.