Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
lanh hoi » lanh hai, lanh voi, hanh thoi
so sanh » do sanh
dang xa » dang xay, lang xa, dang ha
van cac » van hac, van cau, van bac
duc ban » duc tan, dua ban, duc man
duc van » duc tan, duc manh, duc phan
hoi cua » hoi chuc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: so sanh _ dang xa hoi. hieu van cac ((duc ban) or (((duc van) OR (duc va)))) lanh hoi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sanh _ dang xa hoi. hieu van cac ((duc ban) OR (((duc van) OR (duc va)))) lanh hoi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sanh _ dang xa hoi. hieu van cac ((duc ban) or (((duc van) OR (duc va)))) lanh hoi cua triet".
• Adding a wildcard symbol may retrieve word variants: so sanh _ dang xa hoi. hieu van cac ((duc ban) or (((duc van) OR (duc va)))) lanh hoi cua triet*.