Perhaps you should try some spelling variations:
technologien system » technological system, technology system, technological systems
communication cross » communication costs
system information » systems information, system formation, systeme d'information
de communication » mobile communication, online communication
3 development » 2 development
cross 3 » cross _, cross 1, cross c
a areas » 1 areas, 2 areas, 4 areas
b aid » _ aid
2 aid » _ aid, 2 aim, 2 air

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "technologien system information ((b aid) OR (2 aid)) de communication cross 3 development a areas.~".
• Adding a wildcard symbol may retrieve word variants: technologien system information ((b aid) OR (2 aid)) de communication cross 3 development a areas.*.