Perhaps you should try some spelling variations:
communication phase » communication case, communication based, communication paper
more communication » force communication, moral communication, vote communication
technology 3.2 » technology 2.2, technology 3.1, technology 2
relativen debt » relative de
3.2 relativen » 3.2 relative, 3.2 relation, 2.2 relative
china labor » china labour, china's labor, child labor
debt price » debt service, debt profile
price more » prices more, price model, police more

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

• Adding a wildcard symbol may retrieve word variants: technology 3.2 relativen debt price more communication phase _ development china labor.*.