Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sach » chinh sach, chiet tach, chieu sang
va phuong » va thuong, cac phuong
doan phan » doanh phan, doanh nhan, doan chuan
toan phan » thanh phan, toan ban, hoa phan
ho chieu » theo chieu, hoc thieu, doi chieu
quang va » quang van, quan va, quang ma
dan phan » dan chan, van phan, dam phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - nhanh quang va phuong cong ((dan phan) or (((doan phan) OR (toan phan)))) cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - nhanh quang va phuong cong ((dan phan) OR (((doan phan) OR (toan phan)))) cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - nhanh quang va phuong cong ((dan phan) or (((doan phan) OR (toan phan)))) cac".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - nhanh quang va phuong cong ((dan phan) or (((doan phan) OR (toan phan)))) cac*.