Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cua triet » cua viet, su triet, va triet
dang xay » dang van, van xay
thanh va » thanh van, hanh va, thanh ha
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
hai cuc » tai cuc, hai cua, thai cua
cuc ban » cua ban, cac ban, cuu ban
va hai » van hai, va chai, va khai
va cua » va chua, via cua, ca cua

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 y ((nang ma) or (dang xay)) hoi. hieu va hai cuc ban thanh va cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang ma) OR (dang xay)) hoi. hieu va hai cuc ban thanh va cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang ma) or (dang xay)) hoi. hieu va hai cuc ban thanh va cua triet*.