Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
doanh van » doan van, doanh va, doanh ban
danh vai » danh sai, danh va, dang van
tham duc » pham duc, tham du, than duc
lieu van » lieu va, hieu van, sieu van
van tham » van thanh, van tuan, van chat
sang tao » hang tai
sang ma » tang ma, nang ma, mang may
tu sach » thu sach, su sach, te sach

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 y ((sang ma) or (sang tao)) hoi. lieu van tham duc va ((danh vai) OR (doanh van)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((sang ma) OR (sang tao)) hoi. lieu van tham duc va ((danh vai) OR (doanh van)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((sang ma) or (sang tao)) hoi. lieu van tham duc va ((danh vai) OR (doanh van)) cua triet".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((sang ma) or (sang tao)) hoi. lieu van tham duc va ((danh vai) OR (doanh van)) cua triet*.