Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung lang
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
nhung don » nhung van, nhung bo
tran cau » tran chau, toan cau, ran cau
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - canh tranh cua ((((nhung cong) OR (nhung don))) or (thong cong)) tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - canh tranh cua ((((nhung cong) OR (nhung don))) OR (thong cong)) tan tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - canh tranh cua ((((nhung cong) OR (nhung don))) or (thong cong)) tan tran cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh tranh cua ((((nhung cong) OR (nhung don))) or (thong cong)) tan tran cau*.