Perhaps you should try some spelling variations:
vaccine communication » machine communications, active communication, reactive communication
communication cross » communication costs
developpement en » developpement et, developpement des, developpement de
can information » von information, von informationen
technology can » technology change, technology 1, technology 2.2
information 1 » information 2, information 3, information 3.2
end vaccine » ant vaccine, aids vaccine, anti vaccine
1 end » 1 ende, _ end, 2 end

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

• Adding a wildcard symbol may retrieve word variants: technology can information 1 end vaccine communication cross _ developpement en afrique.*.