Perhaps you should try some spelling variations:
oral communication » personal communication
communication cost » communication costs, communication costa, communications costs
dam developpement » de developpement, du developpement, au developpement
developpement en » developpement et, developpement des, developpement de
information 2.1 » information 12.1, information 2.2, information 2.7
debatten oral » debatten om, debate moral, debatten das
technology 1 » technology _
2.1 debatten » 2.1 debate, 9.2 debatten, 3.2.6 debatten
cost dam » cost data, cost a, cost dna

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

• Adding a wildcard symbol may retrieve word variants: technology 1 information 2.1 debatten oral communication cost dam developpement en afrique.*.