Perhaps you should try some spelling variations:
true communication » truth communication, time communication, stroke communication
developpement en » developpement et, developpement des, developpement de
4 integrating » _ integrating
technology 4 » technology _, technology 1, technology 3
3.3 auf » 2.3 auf, 3.3.2 auf
1 true » _ true, a true
3.3 au » 3.3 ad, 3.3 ai

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technology 4 integrating _ 1 true communication ((3.3 au) OR (3.3 auf)) developpement en afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology 4 integrating _ 1 true communication ((3.3 au) OR (3.3 auf)) developpement en afrique.*.