Perhaps you should try some spelling variations:
china's communications » china communications, china communication, crisis communications
trade development » software development
development money » developments money, development model, development mode
der variation » de variation, does variation, die variation
money africa » money jamaica, money asia
6 la » a la, _ la, y la
theorie » theories

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "theorie der variation ((6 la) OR (6 a)) china's communications _ trade development money africa.~".
• Adding a wildcard symbol may retrieve word variants: theorie der variation ((6 la) OR (6 a)) china's communications _ trade development money africa.*.