Perhaps you should try some spelling variations:
"1989 iaaf world op" » "1989 imf world op" (Expand Search), "1989 iaaf world _" (Expand Search)
"1989 iaaf world we" » "1989 imf world we" (Expand Search), "1989 iaaf world wide" (Expand Search), "1989 iaaf 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" (Expand Search)
"1989 iaaf word je" » "1989 iaaf wordt de" (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 world we") OR ("1989 iaaf word je"))))) OR ("1989 iaaf wereld op"))) OR ("1989 iaaf wordt op"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"1989 iaaf world op\") OR (((\"1989 iaaf world we\") OR (\"1989 iaaf word je\"))))) OR (\"1989 iaaf wereld op\"))) OR (\"1989 iaaf wordt op\"))".
• Removing quotes may allow a broader search: (((((( 1989 iaaf world op ) OR ((( 1989 iaaf world we ) OR ( 1989 iaaf word je ))))) OR ( 1989 iaaf wereld op ))) OR ( 1989 iaaf wordt op )).
• Adding a wildcard symbol may retrieve word variants: (((((("1989 iaaf world op") OR ((("1989 iaaf world we") OR ("1989 iaaf word je"))))) OR ("1989 iaaf wereld op"))) OR ("1989 iaaf wordt op"))*.