Perhaps you should try some spelling variations:
"automatic river plate." » "automatic driver plate.", "automatic liver plate.", "automatic prover plate.", "automatic river plants.", "automatic river state.", "automatic river plan."
"automatic river system." » "automatic driver system.", "automatic liver system.", "automatic prover system.", "automatic power system."
"population control plants." » "population control plant.", "population control plane.", "population control part."

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("population control plants.") or ((("automatic river plate.") or ("automatic river system."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("population control plants.") OR ((("automatic river plate.") OR ("automatic river system."))))*.
• Removing quotes may allow a broader search: (( population control plants. ) or ((( automatic river plate. ) or ( automatic river system. ))))*.