Perhaps you should try some spelling variations:
developing colonies » developing economies, developing policies, developing countries
oral communication » personal communication
colonies africa » colonial africa, economics africa, colonial america
technology et » technology e, technology ecit, technology eimt
et nationale » der nationale, net national, 3 nationale
nationale de » nationale et, nationale und
de ca » de cas, de la, de sa

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

• Adding a wildcard symbol may retrieve word variants: technology et nationale de ca oral communication costs _ developing colonies africa.*.