Perhaps you should try some spelling variations:
usage compensation » dosage compensation, wage compensation, damage compensation
developpement de » developpement des, developpement durable
innovation pt » innovation 1, innovation 4, innovation 3
time usage » time use, home usage, time age
de africa » does africa, de america, use africa
pt time » part time, past time, port time
4 les » 2 les, 1 les, 3 les
4 le » 4 la, 1 le, 3 le

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 usage compensation ((4 le) OR (4 les)) developpement de africa.~".
• Adding a wildcard symbol may retrieve word variants: technology _ innovation pt time usage compensation ((4 le) OR (4 les)) developpement de africa.*.