Perhaps you should try some spelling variations:
"fshow controls" » "show control", "bow controls", "how control"
"flow controls" » "flow control", "flows control", "flow controller", "fflow controls", "fflows controls", "fshow controls"
"low control" » "flow control", "flows control", "show 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: (("low control") OR ((("flow controls") OR ("fshow controls")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"low control\") or (((\"flow controls\") OR (\"fshow controls\"))))".
• Removing quotes may allow a broader search: (( low control ) or ((( flow controls ) OR ( fshow controls )))).
• Adding a wildcard symbol may retrieve word variants: (("low control") or ((("flow controls") OR ("fshow controls"))))*.