Perhaps you should try some spelling variations:
set developpements » et developpements, et developpement, des developpements
6.2 communication » 3.2 communication, 2.3 communication, 2.7 communication
developpements de » developpement de, developpement des, developpement du
technology end » technology e, technology e.g, technology era
end inflation » und inflation, read inflation, aid inflation
targeting a » targeting _, targeting how
de afrique » de l'afrique, en afrique, l afrique
a 6.2 » a 3.2, a 4.2, a 6.1
a set » _ set

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

• Adding a wildcard symbol may retrieve word variants: technology end inflation targeting a 6.2 communication a set developpements de afrique.*.