Perhaps you should try some spelling variations:
through conversation » through conversations, through conversational, through conservation
conversation costs » congestion costs, compensation costs, conversation worth
development center » development case
over development » power development, river development, order development
relations 7.5 » relations 2.5, relations 7.1, relations 7.3
rich through » price through, africa through, aceh through
costs over » costs other, contests over
center one » center line, center eine, better one
7.5 rich » 7.5 high

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

• Adding a wildcard symbol may retrieve word variants: technology _ relations 7.5 rich through conversation costs over development center one.*.