Perhaps you should try some spelling variations:
communication 2.3.4 » communication 2.3.3, communication 2.3.8, communication 3.3.4
true communication » truth communication, time communication, stroke communication
das development » dams development, gas development, does development
development en » developpement en, development menu, development eco
2 interaction » 3 interaction, 3.2 interaction, 3.1 interaction
technology 2 » technology _, technology 1, technology 3
2.3.4 das » 2.3.1 das, 2.3.2 das, 4.3.4 das
3.3 a » 2.3 a, 4.3 a

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 2 interaction ((3.3 a) OR (3.3 _)) true communication 2.3.4 das development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology 2 interaction ((3.3 a) OR (3.3 _)) true communication 2.3.4 das development en afrique.*.