Perhaps you should try some spelling variations:
business dating » business dealing, business latin, business making
business doing » business during, business using, businessmen doing
wang yong » wang yang, wang hyoung, wang yan
yong hong » hong hong, kong hong, dong hoang
4.1 data » 2.1 data, 3.1 data
1 data » 2.1 data, 3.1 data

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang yong hong ((1 data) OR (4.1 data)) linking ((business doing) OR (business dating)) und ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yong hong ((1 data) OR (4.1 data)) linking ((business doing) or (business dating)) und ;~".
• Adding a wildcard symbol may retrieve word variants: wang yong hong ((1 data) OR (4.1 data)) linking ((business doing) or (business dating)) und ;*.