Perhaps you should try some spelling variations:
peer interactions » peer interaction, prey interactions, des interactions
interactions case » interventions case, interactions a, interactions chapter
pre communication » parte communication, prone communication, true communication
techniques peer » techniques pour, techniques pt, techniques part
60 development » 20 development, 10 development, 6.10 development
case data » cases data, base data, use data
1 afrique » l afrique, en afrique, 1 enrique
costs 60 » costs 20, costs 6.4, costs 168

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: techniques peer interactions case data pre communication costs 60 development 1 afrique.*.