Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
chiet tach » chieu sach
cong ngang » cong nhan, cong quang, cong lang
ngang quan » nang quan, nganh quan, tang quan
hanh hang » thanh hang, hang hang, hanh han
va phuong » va thuong, cac phuong
quan cua » quan luan, ban cua, gian cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chinh sach) or (chiet tach)) - hanh hang va phuong cong ngang quan cua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chinh sach) OR (chiet tach)) - hanh hang va phuong cong ngang quan cua.
• Adding a wildcard symbol may retrieve word variants: doi ((chinh sach) or (chiet tach)) - hanh hang va phuong cong ngang quan cua*.