Perhaps you should try some spelling variations:
phuong cong » phong cong, phung cong, phuong hoang
phuong dong » phuong dung, phuong hoang, chuong duong
chiet tach » chieu sach
ngang tuan » quang tuan, hoang tuan, nganh toan
hanh hang » thanh hang, hang hang, hanh han
hang cac » hang ca, hang cau, bang cac
tuan cu » tuan tu, quan cua, tuan thu

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 cac ((phuong cong) OR (phuong dong)) ngang tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chinh sach) OR (chiet tach)) - hanh hang cac ((phuong cong) OR (phuong dong)) ngang tuan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chinh sach) or (chiet tach)) - hanh hang cac ((phuong cong) OR (phuong dong)) ngang tuan cu".
• Adding a wildcard symbol may retrieve word variants: doi ((chinh sach) or (chiet tach)) - hanh hang cac ((phuong cong) OR (phuong dong)) ngang tuan cu*.