Perhaps you should try some spelling variations:
"online hand research concepts" » "online hand research context", "online rand research concepts", "online land research concepts", "online sand research concepts", "online band research concepts", "online handel research concepts", "online brand research concepts"
"online range search documents" » "online range search document", "online range research documents", "online range searching documents", "online change search documents", "online ring search documents", "nonlinear range search documents", "online random search documents"
"online image search documents" » "online image search document", "online image research documents", "online image searching documents", "line image search documents", "nonlinear image search documents", "online umfrage search documents"

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 range search documents") OR ("online image search documents"))) OR ("online hand research concepts")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"online range search documents\") OR (\"online image search documents\"))) or (\"online hand research concepts\"))".
• Removing quotes may allow a broader search: (((( online range search documents ) OR ( online image search documents ))) or ( online hand research concepts )).
• Adding a wildcard symbol may retrieve word variants: (((("online range search documents") OR ("online image search documents"))) or ("online hand research concepts"))*.