Perhaps you should try some spelling variations:
"1992 world trotting championships" » "1992 world fighting championship", "1992 world winning championships", "1992 world treating championships", "1992 world trusting championships", "1992 world protecting championships", "1993 world trotting championships"
"1997 world running championships" » "1997 world winning championships", "1997 world win championships", "1997 works running championships", "1997 work running championships", "1997 world training championships", "1993 world running championships", "1995 world running championships", "1999 world running championships"
"1994 world running championships" » "1994 world winning championships", "1994 world win championships", "1994 works running championships", "1994 work running championships", "1994 world training championships", "1993 world running championships", "1995 world running championships", "1999 world running 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: (("1992 world trotting championships") OR ((("1997 world running championships") OR ("1994 world running championships")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"1992 world trotting championships\") or (((\"1997 world running championships\") OR (\"1994 world running championships\"))))".
• Removing quotes may allow a broader search: (( 1992 world trotting championships ) or ((( 1997 world running championships ) OR ( 1994 world running championships )))).
• Adding a wildcard symbol may retrieve word variants: (("1992 world trotting championships") or ((("1997 world running championships") OR ("1994 world running championships"))))*.