Perhaps you should try some spelling variations:
face communication » voice communication, de communication, time communication
oil development » rail development, tool development, social development
relativen debt » relative de
technology 2 » technology _, technology 1, technology 3
2 relativen » 2 relative, 2 relatives, 2 relationen
debt crises » debt crisis
crises face » crises case, crises since
china labor » china labour, china's labor, child labor
costs oil » costs only, costs ii, costs iii

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

• Adding a wildcard symbol may retrieve word variants: technology 2 relativen debt crises face communication costs oil development china labor.*.