Perhaps you should try some spelling variations:
running championships » winning championships, trotting championships, win championships
distance mountain » distant mountains, distance multi, distance main
mountain running » mountain using, mountain mining, mountain rudnik
world long » world song, world line, world lost

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: "((world long) OR (world among)) distance mountain running championships".
• Adding a wildcard symbol may retrieve word variants: ((world long) OR (world among)) distance mountain running championships*.