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
van nang » van quang, van ban, van dong
mai hoi » mai khoi, lai hoi, mai doi
dai hoi » dai hoc, dai hai, dai moi
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 (dai hoi)). hieu van nang 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 (dai hoi)). hieu van nang 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 (dai hoi)). hieu van nang luc va tinh viec cua triet".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) nang ((mai hoi) OR (dai hoi)). hieu van nang luc va tinh viec cua triet*.