Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chieu sach » chinh sach, chieu sang, chieu xanh
trang luan » tranh luan, trang tuan, truong luan
cong thanh » dong thanh, cong trinh, cong tan
tang luan » dung luan
pho bac » cho bac, tho bac, kho bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chiet tach)) - hanh ((trang luan) or (tang luan)) phuong cong thanh pho bac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh ((trang luan) OR (tang luan)) phuong cong thanh pho bac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - hanh ((trang luan) or (tang luan)) phuong cong thanh pho bac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - hanh ((trang luan) or (tang luan)) phuong cong thanh pho bac*.