Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
der developpement » de developpement, des developpements, leur developpement
technology rapid » technology rate, technology road, technology trap
rapid population » world population
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 4.1 » rice 2.1, rice 3.1, rice 1

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

• Adding a wildcard symbol may retrieve word variants: technology rapid population und rice 4.1 communication phase der developpement en afrique.*.