Perhaps you should try some spelling variations:
phuong tung » phuong dung, chuong trung, phuong duong
cap phuong » cac phuong, cau phuong, tap phuong
chi sach » chinh sach, chieu sach, co sach
cong cap » cung cap, cong cau, cong cac
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 cong cap phuong tung dan ((khan cap) or (khoan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - thanh cong cap phuong tung dan ((khan cap) OR (khoan va)).
• Adding a wildcard symbol may retrieve word variants: doi chi sach - thanh cong cap phuong tung dan ((khan cap) or (khoan va))*.