Perhaps you should try some spelling variations:
doanh phan » doanh nhan, doan phan, doanh thanh
doanh than » doanh thanh, doanh nhan, doanh tai
cua triet » cua viet, su triet, va triet
sach thu » sach thue, sach thieu, sach tham
thu nang » thi nang, thu hang, thu bang
nang mai » nang ma, nang tai, lang mai
chat duc » chat xuc, chat doc, chet duoc
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
va chat » van chat, va phat, cao chat

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 thu nang mai hoi. lieu va chat duc va ((doanh than) or (doanh phan)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu nang mai hoi. lieu va chat duc va ((doanh than) OR (doanh phan)) cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach thu nang mai hoi. lieu va chat duc va ((doanh than) or (doanh phan)) cua triet*.