Perhaps you should try some spelling variations:
developing economies » development economics, developing countries, emerging economies
oral communication » personal communication
economies africa » economics africa, economies after, economies from
technology help » technologies help, technology how, technology human
help nationale » als nationale, der nationale, et nationale
nationale und » nationalen und, nationale de, nationale et
a developing » a development
costs a » costs _, costs 4
und ca » und car, und cat, und co

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

• Adding a wildcard symbol may retrieve word variants: technology help nationale und ca oral communication costs a developing economies africa.*.