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