Perhaps you should try some spelling variations:
"1989 iaaf world op" » "1989 imf world op" (Expand Search), "1989 iaaf world we" (Expand Search)
"1989 iaaf world _" » "1989 imf world _" (Expand Search)
"1989 iaaf wordt op" » "1989 baas wordt op" (Expand Search), "1989 iaaf wordt de" (Expand Search), "1989 iaaf wordt er" (Expand Search)
"1989 iaaf wereld op" » "1989 iaaf wereld _" (Expand Search)
"1989 iaaf wereld en" » "1989 iaaf wereld _" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((((("1989 iaaf world op") OR ("1989 iaaf wereld op"))) OR ("1989 iaaf wordt op"))) OR ((("1989 iaaf wereld en") OR ("1989 iaaf wereld van"))))) OR ("1989 iaaf world _"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((\"1989 iaaf world op\") OR (\"1989 iaaf wereld op\"))) OR (\"1989 iaaf wordt op\"))) OR (((\"1989 iaaf wereld en\") OR (\"1989 iaaf wereld van\"))))) OR (\"1989 iaaf world _\"))".
• Removing quotes may allow a broader search: (((((((( 1989 iaaf world op ) OR ( 1989 iaaf wereld op ))) OR ( 1989 iaaf wordt op ))) OR ((( 1989 iaaf wereld en ) OR ( 1989 iaaf wereld van ))))) OR ( 1989 iaaf world _ )).
• Adding a wildcard symbol may retrieve word variants: (((((((("1989 iaaf world op") OR ("1989 iaaf wereld op"))) OR ("1989 iaaf wordt op"))) OR ((("1989 iaaf wereld en") OR ("1989 iaaf wereld van"))))) OR ("1989 iaaf world _"))*.