Perhaps you should try some spelling variations:
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
des developpement » des developpements, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
technology 4ir » technology 4, technology 4.1, technology 4.2
4ir inflation » der inflation, die inflation, aid inflation
rate space » state space, trace space, safe space
a des » a der, a das

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

• Adding a wildcard symbol may retrieve word variants: technology 4ir inflation rate space 2.1 communication a des developpement en afrique.*.