Perhaps you should try some spelling variations:
"minu sign" » "menu sign", "min sign", "mini sign"
"minus sig" » "menus sig", "mins sig", "minis sig", "pinus sig", "linus sig"
"minum sig" » "menum sig", "minm sig", "minim sig"
"menums sig" » "menus sig", "menuks sig", "mesums sig"
"menum sig" » "menu sig", "menuk sig", "mesum sig"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("minu sign") or ((((("minus sig") OR ("minum sig"))) or ((("menums sig") or ("menum sig"))))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("minu sign") OR ((((("minus sig") OR ("minum sig"))) OR ((("menums sig") OR ("menum sig")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"minu sign\") or (((((\"minus sig\") OR (\"minum sig\"))) or (((\"menums sig\") or (\"menum sig\"))))))".
• Removing quotes may allow a broader search: (( minu sign ) or ((((( minus sig ) OR ( minum sig ))) or ((( menums sig ) or ( menum sig )))))).
• Adding a wildcard symbol may retrieve word variants: (("minu sign") or ((((("minus sig") OR ("minum sig"))) or ((("menums sig") or ("menum sig"))))))*.