Perhaps you should try some spelling variations:
communications across » communication across, communications cross, communication cross
radio communications » radio communication, data communications
information based » information case, information bank, transformation based
developing karst » developing east, developing forest, developing heart
technologie de » technologies de, technologie der, technologie die
de information » die information, de informacion, e information
karst areas » karstic areas, forest areas, thrust areas
aid radio » a radio, im radio, und radio

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

• Adding a wildcard symbol may retrieve word variants: technologie de information based aid radio communications across _ developing karst areas.*.