Perhaps you should try some spelling variations:
doanh ban » doanh bat, doanh van, doanh nhan
cua triet » cua viet, su triet, va triet
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
van lam » van nam
duoc va » nuoc va, duoc ma, duong va
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach ky tang xa hoi. hieu van lam ((duoc va) or (duc va)) doanh ban cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach ky tang xa hoi. hieu van lam ((duoc va) OR (duc va)) doanh ban cua triet.
• Adding a wildcard symbol may retrieve word variants: toc sach ky tang xa hoi. hieu van lam ((duoc va) or (duc va)) doanh ban cua triet*.