In search form, enter words separated by spaces. To indicate consecutive words, enclose in quotes (").

Search for  
Query:
SELECT ?s ?p ( bif:search_excerpt ( bif:vector ( 'SEMANTIC', 'WEB' ) , ?o ) ) WHERE
  {
    ?s ?p ?o .
    FILTER ( bif:contains ( ?o, '"semantic web"' ) )
  }
LIMIT 10