Perhaps you should try some spelling variations:
communications costs » communication costs, communications _
more communications » korea communications, mce communications, mobile communications
technologien zur » technologien fur, technologien des, technologien und
development male » development make, development mali, development scale
oil development » rail development, tool development, social development
zur relation » zur relativen, der relation, zur revolution
relation gas » relation a, relation des, relation la
prices more » prices power, prices macro
male labor » female labor
costs oil » costs only, costs ii, costs iii

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

• Adding a wildcard symbol may retrieve word variants: technologien zur relation gas prices more communications costs oil development male labor.*.