Perhaps you should try some spelling variations:
child development » world development
8.3 communication » 2.3 communication, 4.3 communication, 1.3 communication
information some » information source, information stored, information space
technology 4.2 » technology 2.2, technology 3.2, technology 4.1
development de » development d, development ds, developpement de
costs child » costs china
advice 8.3 » advice 2.4, advice 3, advice 5.4
de afrique » de l'afrique, en afrique, l afrique

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

• Adding a wildcard symbol may retrieve word variants: technology 4.2 information some advice 8.3 communication costs child development de afrique.*.