Perhaps you should try some spelling variations:
phuong tung » phuong dung, chuong trung, phuong duong
thanh trung » thanh tung
ca phuong » cac phuong, cau phuong, cua phuong
chi sach » chinh sach, chieu sach, co sach
trung ca » trung cap, truong ca, trung cua
tung dan » dung dan, huong dan, trung dai
khan cap » khan ap, than cap, khoan cam
khoan va » doan va, khoa ma, nhan va
doi chi » doi khi

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 - thanh trung ca phuong tung dan ((khan cap) OR (khoan va))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi sach - thanh trung ca phuong tung dan ((khan cap) OR (khoan va))".
• Adding a wildcard symbol may retrieve word variants: doi chi sach - thanh trung ca phuong tung dan ((khan cap) OR (khoan va))*.