Perhaps you should try some spelling variations:
oral communication » personal communication
communication cost » communication costs, communication costa, communications costs
power development » water development, career development, hydropower development
technologies new » technologies _, technologies 4, technologies 2
new information » 2 information
china afrique » china africa
cost power » cost per, soft power
de oral » de otras, new oral

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies new information _ de oral communication cost power development china afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies new information _ de oral communication cost power development china afrique.*.