Perhaps you should try some spelling variations:
"flat world championships 2011" » "flat world championships 1976", "flat world championships 8", "flat world championships 9.3"
"flat world championship 1" » "flat world championship _", "flat world championship 4", "flat world championships 8"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"flat world championships 2011\") OR (\"flat world championship 1\"))".
• Removing quotes may allow a broader search: (( flat world championships 2011 ) OR ( flat world championship 1 )).
• Adding a wildcard symbol may retrieve word variants: (("flat world championships 2011") OR ("flat world championship 1"))*.