Perhaps you should try some spelling variations:
"value o ratio" » "value 4 ratio", "value 3 ratio", "value 2 ratio", "value o ratios"
"value 5 ratio" » "value _ ratio", "value 4 ratio", "value 3 ratio", "value 5 radio"
"value a ratio" » "value a radio", "value a rating"

Try widening your search to All Fields.

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: (("value o ratio") OR ((("value 5 ratio") OR ("value a ratio")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"value o ratio\") or (((\"value 5 ratio\") OR (\"value a ratio\"))))".
• Removing quotes may allow a broader search: (( value o ratio ) or ((( value 5 ratio ) OR ( value a ratio )))).
• Adding a wildcard symbol may retrieve word variants: (("value o ratio") or ((("value 5 ratio") OR ("value a ratio"))))*.