Perhaps you should try some spelling variations:
communication cost » communication costs, communication costa, communications costs
more communication » force communication, moral communication, vote communication
rural development » social development
development case » development china
technology 4ir » technology 4, technology 4.1, technology 4.2
4ir relative » die relative, 4 relative, der relative
relative del » relative de, relative well, relative sea
proceso more » process more, process core, process model
del proceso » el proceso, dual process
case labor » care labor, based labor, male labor

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

• Adding a wildcard symbol may retrieve word variants: technology 4ir relative del proceso more communication cost rural development case labor.*.