Perhaps you should try some spelling variations:
communication cross » communication costs
development base » development based, development case, development cases
3 communication » 4 communication, de communication, data communication
technologien 2 » technologies 2, technologien _, technologien 1
3 development » 2 development
base areas » basic areas, based areal, basin areas
cross 3 » cross _, cross 1, cross c
2 aid » _ aid, 2 aim, 2 add
2 air » _ air, 2 aim

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 2 information ((2 aid) OR (2 air)) 3 communication cross 3 development base areas.~".
• Adding a wildcard symbol may retrieve word variants: technologien 2 information ((2 aid) OR (2 air)) 3 communication cross 3 development base areas.*.