Perhaps you should try some spelling variations:
trade development » software development
technologies 4 » technologies _
development en » developpement en, development menu, development eco
4 information » 2 information, 1 information
3 application » 4 application
application 3 » application _, application 1, application 5
6 wages » _ wages
7 wages » _ wages
3 trade » 1 trade, 4 trade, 2 trade

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: "technologies 4 information ((6 wages) OR (7 wages)) 3 application 3 trade development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: technologies 4 information ((6 wages) OR (7 wages)) 3 application 3 trade development en afrique.*.