Perhaps you should try some spelling variations:
use compensation » de compensation, based compensation, wage compensation
au developpement » du developpement, de developpement, le developpement
technology 3 » technology _, technology 1, technology 4
3 innovation » 2 innovation
et africa » eu africa, west africa, east africa
em africa » 1 africa

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 innovation a time use compensation _ au developpement ((et africa) OR (em africa)).~".
• Adding a wildcard symbol may retrieve word variants: technology 3 innovation a time use compensation _ au developpement ((et africa) OR (em africa)).*.