Perhaps you should try some spelling variations:
"1994 world trotting championships" » "1994 world fighting championship", "1994 world treating championships", "1994 world trusting championships", "1994 world protecting championships", "1992 world trotting championships", "1993 world trotting championships", "1995 world trotting championships"
"1997 world winning championships" » "1997 world win championships", "1997 world fighting championship", "1997 world winning relationships", "1997 world signing championships", "1997 worth winning championships", "1997 world bringing championships", "1992 world winning championships", "1993 world winning championships", "1995 world winning championships"
"1997 world running championships" » "1997 world win championships", "1997 works running championships", "1997 work running championships", "1997 world training championships", "1992 world running championships", "1993 world running championships", "1995 world running championships"
"1997 world mining championships" » "1997 world win championships", "1997 world fighting championship", "1997 world mining relationships", "1997 world making championships", "1997 world moving championships", "1997 world combining championships", "1992 world mining championships", "1993 world mining championships", "1995 world mining championships"

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: (("1994 world trotting championships") OR ((((("1997 world winning championships") OR ("1997 world running championships"))) OR ("1997 world mining championships")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"1994 world trotting championships\") or (((((\"1997 world winning championships\") OR (\"1997 world running championships\"))) or (\"1997 world mining championships\"))))".
• Removing quotes may allow a broader search: (( 1994 world trotting championships ) or ((((( 1997 world winning championships ) OR ( 1997 world running championships ))) or ( 1997 world mining championships )))).
• Adding a wildcard symbol may retrieve word variants: (("1994 world trotting championships") or ((((("1997 world winning championships") OR ("1997 world running championships"))) or ("1997 world mining championships"))))*.