Perhaps you should try some spelling variations:
foreign conquest » foreign conquests, foreign consent, foreign content
forests current » concepts current, contents current, currents current
foreign parent » foreign patent, foreign patents, foreign talent
costs current » assets current, robots current, its current

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((foreign conquest) OR (foreign parent))) OR (((forests current) OR (costs current)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((foreign conquest) or (foreign parent))) or (((forests current) OR (costs current))))".
• Adding a wildcard symbol may retrieve word variants: ((((foreign conquest) or (foreign parent))) or (((forests current) OR (costs current))))*.