Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
chiet tach » chieu sach
doi chiet » doi chieu, doi chi, doi viet
tranh cua » doanh cua, manh cua
cua tong » cua cong, cua dong, cua nong
cong dan » cong san, cong tan, huong dan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - canh tranh cua tong ((cong dan) or (cong thanh)) phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - canh tranh cua tong ((cong dan) OR (cong thanh)) phan cac.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - canh tranh cua tong ((cong dan) or (cong thanh)) phan cac*.