Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang khoi » dung khoa, hang khoa
hieu van » hieu va, thien van, lieu va
toc sach » hoc sach, doc sach, thuoc sach
dan khai » dang khai, van khai, doan khac
hac tuc » thac toc, thai tuc
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
van hac » van hoc, van ha, van hai
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((te sach) OR (toc sach)) ty nang xa hoi. hieu van hac tuc va ((dan khai) or (dang khoi)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty nang xa hoi. hieu van hac tuc va ((dan khai) OR (dang khoi)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty nang xa hoi. hieu van hac tuc va ((dan khai) or (dang khoi)) cua triet".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty nang xa hoi. hieu van hac tuc va ((dan khai) or (dang khoi)) cua triet*.