Perhaps you should try some spelling variations:
canh soanh » canh tranh, hanh doanh, oanh oanh
cong thanh » cong trinh, cong tan, truong thanh
dong thanh » truong thanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
soanh cua » doanh cua, manh cua, tranh cua
cua khong » hua khong, cua phuong, cua thuong
hoc hieu » hoc thieu, hoc hien, doc hieu
chan dau » phan dau, han dau, chuan dao
doan » doanh, dan, toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - canh soanh cua khong ((cong thanh) OR (dong thanh)) ((chan dau) or (chan doan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - canh soanh cua khong ((cong thanh) OR (dong thanh)) ((chan dau) OR (chan doan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - canh soanh cua khong ((cong thanh) OR (dong thanh)) ((chan dau) or (chan doan))".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - canh soanh cua khong ((cong thanh) OR (dong thanh)) ((chan dau) or (chan doan))*.