Perhaps you should try some spelling variations:
"1997 world trotting championships" » "1997 world fighting championship", "1997 world winning championships", "1997 world treating championships", "1997 world trusting championships", "1997 world protecting championships", "1992 world trotting championships", "1993 world trotting championships", "1995 world trotting championships"
"1994 world trotting championships" » "1994 world fighting championship", "1994 world winning championships", "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 signing championships" » "1997 world winning championships", "1997 world fighting championship", "1997 world win championships", "1997 world designing championships", "1997 world mining championships", "1992 world signing championships", "1993 world signing championships", "1995 world signing 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: (((("1997 world trotting championships") OR ("1997 world signing championships"))) OR ("1994 world trotting championships")).
• Removing quotes may allow a broader search: (((( 1997 world trotting championships ) or ( 1997 world signing championships ))) or ( 1994 world trotting championships )).
• Adding a wildcard symbol may retrieve word variants: (((("1997 world trotting championships") or ("1997 world signing championships"))) or ("1994 world trotting championships"))*.