Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hang dau » hang va, hang tai
danh dau » lanh dao, danh tu, xang dau
van chat » cao chat
chat soc » cham soc, chat hoc, chat doc
sach ky » sac ky, sach y, sach ty
nang xa » lang xa, nang ma, mang xa
tu sach » thu sach, su sach, te sach
soc va » hoc va, loc va, doc 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 sach ky ((nang xa) OR (nang x)) hoi. hieu van chat soc va ((danh dau) or (hang dau)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((nang xa) OR (nang x)) hoi. hieu van chat soc va ((danh dau) OR (hang dau)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((nang xa) OR (nang x)) hoi. hieu van chat soc va ((danh dau) or (hang dau)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((nang xa) OR (nang x)) hoi. hieu van chat soc va ((danh dau) or (hang dau)) cua triet*.