Perhaps you should try some spelling variations:
business during » business enduring, businesses during, business using
business doing » business dating, business using, businessmen doing
data linking » data taking, data linkage
wang hong » wang yong, wang hyoung, wang lihong
ng 2.1 » eg 2.1, tg 2.1, king 2.1
ag 2.1 » ag 2.2, eg 2.1, tg 2.1

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang hong ((ng 2.1) OR (ag 2.1)) data linking ((business doing) or (business during)) a ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang hong ((ng 2.1) OR (ag 2.1)) data linking ((business doing) OR (business during)) a ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang hong ((ng 2.1) OR (ag 2.1)) data linking ((business doing) or (business during)) a ;*".