Perhaps you should try some spelling variations:
"algemene werking van 1013" » "algemene werking van 1993" (Expand Search), "algemene werking van 1917" (Expand Search), "algemene werking van 110" (Expand Search)
"algemene staking van 161" » "algemene staking van 16" (Expand Search), "algemene staking van 16u" (Expand Search), "algemene staking van 1917" (Expand Search)
"algemene staking van 19" » "algemene staking van 17" (Expand Search), "algemene staking van 16" (Expand Search), "algemene staking van 14" (Expand Search)
"algemene staking van 15" » "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 staking van 161") OR ((("algemene staking van 19") OR ("algemene staking van 15"))))) OR ("algemene staking van 11"))) OR ((("algemene staking van 10") OR ("algemene staking van 18"))))) OR ("algemene werking van 1013"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((((((\"algemene staking van 161\") OR (((\"algemene staking van 19\") OR (\"algemene staking van 15\"))))) OR (\"algemene staking van 11\"))) OR (((\"algemene staking van 10\") OR (\"algemene staking van 18\"))))) OR (\"algemene werking van 1013\"))".
• Removing quotes may allow a broader search: (((((((( algemene staking van 161 ) OR ((( algemene staking van 19 ) OR ( algemene staking van 15 ))))) OR ( algemene staking van 11 ))) OR ((( algemene staking van 10 ) OR ( algemene staking van 18 ))))) OR ( algemene werking van 1013 )).
• Adding a wildcard symbol may retrieve word variants: (((((((("algemene staking van 161") OR ((("algemene staking van 19") OR ("algemene staking van 15"))))) OR ("algemene staking van 11"))) OR ((("algemene staking van 10") OR ("algemene staking van 18"))))) OR ("algemene werking van 1013"))*.