Perhaps you should try some spelling variations:
causes communication » mass communication, crisis communication, assess communication
radio development » trade development, hydro development, paradigm development
technology set » technology sector, technology 1, technology 2.2
relative food » operative food, relative role, relative crop
prices causes » prices cases, crises causes, crisis causes
set relative » der relative, key relative, sog relative
costs radio » costs credit
china data » china update, chinese data

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

• Adding a wildcard symbol may retrieve word variants: technology set relative food prices causes communication costs radio development china data.*.