Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
3.3 communication » 2.3 communication, 3.2 communication, 3.5 communication
der developpement » de developpement, des developpements, leur developpement
technology world » technology work, technological world, technology working
developpement en » developpement et, developpement des, developpement de
population und » population fund, population under, population using
und rice » und race, under rice, und rache
rice 3.3 » rice 3.1, rice 2.1, rice 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology world population und rice 3.3 communication phase der developpement en afrique.*.