Perhaps you should try some spelling variations:
phuong cong » phuong dong, phong cong, phung cong
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
va phuong » va thuong, cac phuong
chi sach » chieu sach, co sach, moi sach
tinh va » tich va, trinh van, trinh vat
san can » ban can, san chang, van canh
san van » tan van, luan van, tran van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chi sach) or (chinh sach)) - hanh tinh va phuong cong ((san can) or (san van)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi sach) OR (chinh sach)) - hanh tinh va phuong cong ((san can) OR (san van)) ban.
• Adding a wildcard symbol may retrieve word variants: doi ((chi sach) or (chinh sach)) - hanh tinh va phuong cong ((san can) or (san van)) ban*.