Perhaps you should try some spelling variations:
plan development » clean development, land development, human development
information 1.2 » information 1.5.2, information 2
3 communication » 4 communication, de communication, data communication
development doi » development doing, development does, development d
systems plan » systems place, systems land, system plant
1.2 der » 2.2 der, 3.2 der, 4.2 der
der 3 » der _, der e, des 3

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

• Adding a wildcard symbol may retrieve word variants: technologies _ information 1.2 der 3 communication systems plan development doi afrique.*.