Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
thanh van » thanh san, thanh toan, thanh phan
dang xay » dang van, van xay
thanh va » hanh va, thanh ha, thanh ve
hieu van » hieu va, thien van, lieu va
te sach » toc sach
hai cuc » tai cuc, hai cua, thai cua
nang ma » tang ma, sang ma, nang cao
van hai » van ha, van chat, van hanh
cuc va » chuc va, duc va, cuu va

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang ma) OR (dang xay)) hoi. hieu van hai cuc va ((thanh va) OR (thanh van)) cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang ma) or (dang xay)) hoi. hieu van hai cuc va ((thanh va) OR (thanh van)) cua triet~".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) or (dang xay)) hoi. hieu van hai cuc va ((thanh va) OR (thanh van)) cua triet*.