Perhaps you should try some spelling variations:
communication 4.3.4 » communication 2.3.4, communication 3.3.4, communication 4.3.1
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
4.3.4 das » 4.3.2 das, 4.3.1 das
1 10 » 1 1, 9 10, 7 10
_ 10 » _ 1

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 ((1 10) OR (_ 10)) true communication 4.3.4 das development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology 2 interaction ((1 10) OR (_ 10)) true communication 4.3.4 das development en afrique.*.