Perhaps you should try some spelling variations:
guinea communications » business communications, online communications, data communications
communications 1.1 » communication 1.1, communications 2.1, communications 5.1
test development » forest development, port development, mena development
der variation » de variation, does variation, die variation
1.1 test » 3.1 test, 4.1 test, 2.1 test
6 new » _ new, a new, 5 new
3 new » _ new, a new
theorie » theories

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: "theorie der variation ((6 new) OR (3 new)) guinea communications 1.1 test development 1 africa.~".
• Adding a wildcard symbol may retrieve word variants: theorie der variation ((6 new) OR (3 new)) guinea communications 1.1 test development 1 africa.*.