Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cua sinh » hoa sinh, va sinh
cong dan » cong san, cong tan, huong dan
than ban » thanh ban, toan ban, nhuan ban
than man » than ma, thanh san, tran manh
hoi cua » hoi chuc

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoi cua sinh - hanh tranh cua nhung cong dan ((than ban) OR (than man))~".
• Adding a wildcard symbol may retrieve word variants: hoi cua sinh - hanh tranh cua nhung cong dan ((than ban) OR (than man))*.