Perhaps you should try some spelling variations:
communication 3.4.2 » communication 3.4.1, communication 3.4.4, communications 6.4.2
time communication » de communication, mobile communication, online communication
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
3.4.2 gas » 3.4.2 das, 3.4.2 case, 3.4.2 a
3.3 e » 3.3 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 e) OR (3.3 _)) time communication 3.4.2 gas development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology 2 interaction ((3.3 e) OR (3.3 _)) time communication 3.4.2 gas development en afrique.*.