Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
dang khai » dang khoi, dang hai, quang khai
hieu van » hieu va, thien van, lieu va
dan khai » van khai, dang khoi, doan khac
hac thuc » hoc thuc, ha thuc, thach thuc
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
mang xa » lang xa, mang may, dang xay
van hac » van hoc, van ha, van hai

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