Perhaps you should try some spelling variations:
"1997 world testing championships" » "1997 world testing relationships", "1997 world win championships", "1997 world treating championships", "1997 world setting championships", "1997 world getting championships", "1992 world testing championships", "1995 world testing championships", "1999 world testing championships"
"1993 world winning championships" » "1993 world win championships", "1993 world winning relationships", "1993 world running championships", "1993 world mining championships", "1993 world signing championships", "1992 world winning championships"
"1997 world trotting championships" » "1997 world treating championships", "1997 world trusting championships", "1997 world protecting championships", "1992 world trotting championships", "1995 world trotting championships", "1999 world trotting championships"
"1997 world fighting championship" » "1997 world lighting championship", "1997 world righting championship", "1997 worth fighting championship", "1992 world fighting championship", "1995 world fighting championship", "1999 world fighting championship"

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 testing championships") OR ("1997 world fighting championship"))) OR ("1993 world winning championships")))).
• Removing quotes may allow a broader search: (( 1997 world trotting championships ) or ((((( 1997 world testing championships ) or ( 1997 world fighting championship ))) or ( 1993 world winning championships )))).
• Adding a wildcard symbol may retrieve word variants: (("1997 world trotting championships") or ((((("1997 world testing championships") or ("1997 world fighting championship"))) or ("1993 world winning championships"))))*.