Perhaps you should try some spelling variations:
tinh viec » tinh viet, dinh viec, sinh viec
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
mai hoi » mai khoi, dai hoi, mai doi
lai hoi » dai hoi, lai hoa, lai roi
nam luc » nang luc, nhan luc, nam thuc
va tinh » may tinh
sac ky » sai ky
luc va » duc va, tuc va, loc va

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