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