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