Perhaps you should try some spelling variations:
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
technology other » technology together, technologies other, technology theory
le developpement » de developpement, sme development
developpement en » developpement et, developpement des, developpement de
other education » mothers education, further education, higher education
education aid » education a
aid cases » aids cases, aid case, mild cases
cases 6.2 » cases 2.2, cases 4.2, cases 3.2
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 other education aid cases 6.2 communication costs le developpement en afrique.*.