Perhaps you should try some spelling variations:
3.7 communication » 3.2 communication, 2.7 communication, 3.5 communication
le developpement » de developpement, sme development
developpement de » developpement des, developpement durable
technology rule » technology role, technology rate, technology risk
rule induction » use induction, gene induction, culture induction
induction age » induction one, introduction age, induction after
age change » wage change, age changes, wage changes
change 3.7 » change 3.1, change 3.2, change 3.4
de afrique » de l'afrique, en afrique, l afrique
costs le » costs _, costs 4, costs a

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

• Adding a wildcard symbol may retrieve word variants: technology rule induction age change 3.7 communication costs le developpement de afrique.*.