Perhaps you should try some spelling variations:
model development » local development, social development, global development
pt communication » put communication, et communication, post communication
technology cost » technology case, technology can, technology choice
cost relations » east relations, post regulations, cost reductions
relations 2 » relations _, relations a, relations 3
costs model » cost model, cost models, costs money
china earth » china early, china north, china part
prices pt » prices part, prices _, prices a
2 prices » 2 price, 2 proces, do prices

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

• Adding a wildcard symbol may retrieve word variants: technology cost relations 2 prices pt communication costs model development china earth.*.