Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phuong hoang
chieu sach » chinh sach, chiet tach, chieu sang
phung cong » nhung cong, phong cong, nhung chong
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, trinh va
van tan » van tuan, van ban, van tai

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 - canh tranh va ((phuong cong) OR (phung cong)) ((tan tran) or (van tan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh tranh va ((phuong cong) OR (phung cong)) ((tan tran) OR (van tan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - canh tranh va ((phuong cong) OR (phung cong)) ((tan tran) or (van tan)) ban".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh tranh va ((phuong cong) OR (phung cong)) ((tan tran) or (van tan)) ban*.