Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
innovation across » innovation als
2.1 communication » 2.14 communication, 2.3 communication, 2.7 communication
die developpement » de developpement, le developpement, du developpement
developpement en » developpement et, developpement des, developpement de
across prices » cross price, across crises, across provinces
technology 2 » technology _, technology 1, technology 3
prices 2.1 » prices 2.4, prices 2.3, prices 3.1
phase die » phase i, phase ii, phase iii

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

• Adding a wildcard symbol may retrieve word variants: technology 2 innovation across prices 2.1 communication phase die developpement en afrique.*.