Perhaps you should try some spelling variations:
"flow controls" » "flow controller", "fshow controls", "fnew controls", "fyaw controls"
"flows control" » "flood control", "floor control"
"flow control" » "fshow control", "fnew control", "fyaw control"
"low control" » "show control", "new control", "yaw control"

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: (("flow control") OR ((("low control") OR ((("flow controls") OR ("flows control")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"flow control\") or (((\"low control\") or (((\"flow controls\") OR (\"flows control\"))))))".
• Removing quotes may allow a broader search: (( flow control ) or ((( low control ) or ((( flow controls ) OR ( flows control )))))).
• Adding a wildcard symbol may retrieve word variants: (("flow control") or ((("low control") or ((("flow controls") OR ("flows control"))))))*.