Perhaps you should try some spelling variations:
guinea communications » business communications, online communications, data communications
does variation » de variation, der variation, die variation
theorie does » theorie des, theorie der, theorie die
1 afrique » l afrique, en afrique, 1 enrique
a zum » a zur, 1 zum, 3 zum
2 zum » 2 zur, 1 zum

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

• Performing a fuzzy search may retrieve terms with similar spellings: theorie does variation _ new guinea communications ((a zum) OR (2 zum)) development 1 afrique.~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theorie does variation _ new guinea communications ((a zum) OR (2 zum)) development 1 afrique.*".