Perhaps you should try some spelling variations:
a developpement » au developpement, de developpement, le developpement
compensation 4 » compensation _, compensation law, compensating _
innovation pt » innovation 1, innovation 4, innovation 3
time usage » time use, home usage, time wage
des africa » does africa, yes africa, de africa
time age » time wage, prime age, time 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 _ innovation pt ((time age) OR (time usage)) compensation 4 a developpement des africa.~".
• Adding a wildcard symbol may retrieve word variants: technology _ innovation pt ((time age) OR (time usage)) compensation 4 a developpement des africa.*.