Perhaps you should try some spelling variations:
technology german » technology germany, technology thermal, technology human
de communication » mobile communication, online communication
development east » development southeast, development 1
german nation » german inflation, german education
east africa » west africa
papers a » papers _, papers 5, papers 1
papers 6 » papers _, papers 5

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

• Performing a fuzzy search may retrieve terms with similar spellings: technology german nation ((papers a) OR (papers 6)) de communication _ a development east africa.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "technology german nation ((papers a) OR (papers 6)) de communication _ a development east africa.*".