Perhaps you should try some spelling variations:
communication 3.4.4 » communication 3.3.4, communication 3.4.1, communication 2.3.4
true communication » truth communication, time communication, stroke communication
development en » developpement en, development menu, development eco
3 interaction » 2 interaction, 3.2 interaction, 3.1 interaction
technology 3 » technology _, technology 1, technology 4
3.4.4 gas » 3.4.2 gas, 3.4.1 gas, 1.3.4 gas
3.3 1 » 3.3 a, 3.3 e, 3.0 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 3 interaction ((3.3 1) OR (3.3 _)) true communication 3.4.4 gas development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology 3 interaction ((3.3 1) OR (3.3 _)) true communication 3.4.4 gas development en afrique.*.