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 4.2 » technology 2.2, technology 3.2, technology 4.1
4.2 relative » 2.2 relative, 1.2 relative, 3.2 relative
relative des » relative de, relative sea, relatifs des
proceso more » process more, process core, process model
des proceso » del proceso, der proceso, el proceso
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 4.2 relative des proceso more communication cost rural development case labor.*.