Perhaps you should try some spelling variations:
communication costs » communication systems, communication efforts, communication skills
technologies trade » technologies create, technology trade, technologies reduce
oral communication » mobile communication, _ communication, risk communication
trade information » price information, private information, credit information
information needs » information flows, information networks
per development » power development, spur development, power developments
costs per » cost per
needs de » needs _, needs a

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies trade information needs de oral communication costs per development _ afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies trade information needs de oral communication costs per development _ afrique.*.