Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cua triet » cua viet, su triet, va triet
sach nay » sach hay, sach vay, sach nang
nay tang » nam tang, tay tang, anai tang
chat luc » chat xuc, chat lua, nhan luc
danh vai » danh sai, danh va, dang van
tu sach » thu sach, su sach, te sach
tang xa » trang xa, tang ma, lang xa
hieu ve » hieu va, hieu van
ve chat » va chat, van chat
luc va » duc va, tuc va, loc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach nay tang xa hoi. hieu ve chat luc va ((danh vai) or (doanh van)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach nay tang xa hoi. hieu ve chat luc va ((danh vai) OR (doanh van)) cua triet.
• Adding a wildcard symbol may retrieve word variants: tu sach nay tang xa hoi. hieu ve chat luc va ((danh vai) or (doanh van)) cua triet*.