Perhaps you should try some spelling variations:
luan phong » luan phuong, xuan phuong, van phong
luan phung » luan phuong, luan chung, luan hung
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cong tac » cong ty
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - hoat dong ((luan phung) or (luan phong)) cong tac ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - hoat dong ((luan phung) OR (luan phong)) cong tac ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: theo chu sach - hoat dong ((luan phung) or (luan phong)) cong tac ((toan cau) or (toan ban))*.