Perhaps you should try some spelling variations:
research elements » research experiments, research effects, research students
channel research » change research, chain research, changing research
handel research » panel research, hanse research, handover research
line creatings » lines creating, link creating, line gratings
line creating » linux creating, one creating, engine creating
online ring » online during, online rating, online racing

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: (( online ((handel research) OR (channel research)) documents ) OR ( ((line creatings) OR (((online ring) OR (line creating)))) research elements )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( online ((handel research) OR (channel research)) documents ) or ( ((line creatings) or (((online ring) or (line creating)))) research elements ))".
• Adding a wildcard symbol may retrieve word variants: (( online ((handel research) OR (channel research)) documents ) or ( ((line creatings) or (((online ring) or (line creating)))) research elements ))*.