Perhaps you should try some spelling variations:
oral communication » personal communication
developing europe » development europe, developed europe, developing crop
technologies 2.1 » technologies _, technologies 4, technologies a
2.1 information » 3.1 information
information 6.1 » information 1, information 1.2, information 1.3
europe africa » europe asia
gegner oral » gegner moral, einer oral
6.1 gegner » 6.2 gegner, 5.2 gegner, 7.2 gegner

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

• Adding a wildcard symbol may retrieve word variants: technologies 2.1 information 6.1 gegner oral communication costs _ developing europe africa.*.