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
mai hoi » mai khoi, dai hoi, lai hoi
nam luc » nang luc, nhan luc, nam thuc
luc may » truc may, phuc may
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
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 sang ((ma hoi) OR (mai hoi)). hieu van nam luc may ((tinh viec) or (tinh viet)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky sang ((ma hoi) OR (mai hoi)). hieu van nam luc may ((tinh viec) OR (tinh viet)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang ((ma hoi) OR (mai hoi)). hieu van nam luc may ((tinh viec) or (tinh viet)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ((ma hoi) OR (mai hoi)). hieu van nam luc may ((tinh viec) or (tinh viet)) cua triet*.