Perhaps you should try some spelling variations:
"algemene werking van 1913" » "algemene werking van 1995" (Expand Search), "algemene werking van 1013" (Expand Search), "algemene werking van 1813" (Expand Search), "algemene werking van 1713" (Expand Search)
"algemene staking van 1993" » "algemene staking van 1995" (Expand Search), "algemene staking van 1093" (Expand Search), "algemene staking van 1893" (Expand Search), "algemene staking van 1793" (Expand Search)
"algemene staking van 1093" » "algemene staking van 10" (Expand Search), "algemene staking van 1995" (Expand Search)
"algemene werking van 11" » "algemene werking van 10" (Expand Search)
"algemene staking van 19" » "algemene staking van 10" (Expand Search), "algemene staking van 18" (Expand Search), "algemene staking van 17" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((((("algemene werking van 1913") OR ("algemene werking van 11"))) OR ((("algemene staking van 1993") OR ("algemene staking van 1093"))))) OR ("algemene staking van 19"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((\"algemene werking van 1913\") OR (\"algemene werking van 11\"))) OR (((\"algemene staking van 1993\") OR (\"algemene staking van 1093\"))))) OR (\"algemene staking van 19\"))".
• Removing quotes may allow a broader search: (((((( algemene werking van 1913 ) OR ( algemene werking van 11 ))) OR ((( algemene staking van 1993 ) OR ( algemene staking van 1093 ))))) OR ( algemene staking van 19 )).
• Adding a wildcard symbol may retrieve word variants: (((((("algemene werking van 1913") OR ("algemene werking van 11"))) OR ((("algemene staking van 1993") OR ("algemene staking van 1093"))))) OR ("algemene staking van 19"))*.