Perhaps you should try some spelling variations:
"1997 world treating championships" » "1997 world trotting championships", "1997 world creating champions", "1997 world fighting championship", "1997 world creating championships", "1997 world trading championships", "1997 world setting championships", "1993 world treating championships", "1995 world treating championships", "1999 world treating championships"
"1997 world signing championships" » "1997 world winning championships", "1997 world fighting championship", "1997 world trotting championships", "1997 world designing championships", "1997 worlds designing championships", "1993 world signing championships", "1995 world signing championships", "1999 world signing championships"
"1992 world mining championships" » "1992 world winning championships", "1992 world win championships", "1992 world trotting championships", "1992 world making championships", "1992 world moving championships", "1992 world combining championships", "1993 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: (("1997 world treating championships") OR ((("1992 world mining championships") OR ("1997 world signing championships")))).
• Removing quotes may allow a broader search: (( 1997 world treating championships ) or ((( 1992 world mining championships ) or ( 1997 world signing championships )))).
• Adding a wildcard symbol may retrieve word variants: (("1997 world treating championships") or ((("1992 world mining championships") or ("1997 world signing championships"))))*.