Perhaps you should try some spelling variations:
mobile communications » mobile communication
communications cross » communication cross, communications costs, communication across
sub developpement » du developpement, au developpement, ou developpement
math information » catch information, much information, health information
developpement en » developpement et, developpement des, developpement de
technology math » technology paths, technology mit, technology make
information 4 » information 2
der mobile » der mobilen, der mobil, does mobile
cross sub » across sub, cross sea
4 der » _ der, 2 der, 3 der

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

• Adding a wildcard symbol may retrieve word variants: technology math information 4 der mobile communications cross sub developpement en afrique.*.