Perhaps you should try some spelling variations:
"mixed initiative part" » "road initiative part", "mixed initiatives part", "mixed initiative a"
"mixed martial arts" » "mixed metal arts", "mixed martial parts", "mixed martial alsos"
"mixed martial art" » "mixed metal art", "mixed martial part", "mixed martial also"
mixed partial » based partial
"mixed initial part" » "mixed initial phase", "mixed initial plan", "mixed initial ph"
"mixed initial post" » "mixed initial phase", "mixed initial position", "mixed initial plan"
mixed martin » mixed mating, mixed matrix, mixed markov
"mixed initial art" » "mixed initial care", "mixed initial app", "mixed initial agent"

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: (("mixed martial arts") OR ((((("mixed martial art") OR ((("mixed initial art") OR ((((("mixed initial part") OR ("mixed initial post"))) OR ("mixed initiative part"))))))) OR ("((((mixed martin) or (mixed multi))) or (mixed partial)) part")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mixed martial arts\") or (((((\"mixed martial art\") or (((\"mixed initial art\") or (((((\"mixed initial part\") OR (\"mixed initial post\"))) or (\"mixed initiative part\"))))))) or (\"((((mixed martin) or (mixed multi))) or (mixed partial)) part\"))))".
• Removing quotes may allow a broader search: (( mixed martial arts ) or ((((( mixed martial art ) or ((( mixed initial art ) or ((((( mixed initial part ) OR ( mixed initial post ))) or ( mixed initiative part ))))))) or ( ((((mixed martin) or (mixed multi))) or (mixed partial)) part )))).
• Adding a wildcard symbol may retrieve word variants: (("mixed martial arts") or ((((("mixed martial art") or ((("mixed initial art") or ((((("mixed initial part") OR ("mixed initial post"))) or ("mixed initiative part"))))))) or ("((((mixed martin) or (mixed multi))) or (mixed partial)) part"))))*.