Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
2.3 communication » 3.2 communication, de communication, 4 communication
der developpement » de developpement, des developpements, leur developpement
developpement la » developpement de, developpement et, developpement du
innovation when » innovation where, innovation what, innovation why
technology 2 » technology _, technology 1, technology 3
when price » when prices, when prime, wheat price
la afrique » l afrique, la fabrique, en afrique
price 2.3 » price 3, price 4.4

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

• Adding a wildcard symbol may retrieve word variants: technology 2 innovation when price 2.3 communication phase der developpement la afrique.*.