c:\@Work\Perl>perl -wMstrict -le
"print qq{perl version: $] \n};
 ;;
 my $parse1 = '/newsearch/detail/96603';
 my $parse2 = '';
 ;;
 for (
   qq{xxx \n/newsearch/detail/96603\n xxx},
   qq{xxx \n/newsearch/detail/96603x\n xxx},
   qq{xxx \nx/newsearch/detail/96603x\n xxx},
   qq{xxx \nx/newsearch/detail/96603\n xxx},
   qq{bla vla/newsearch/detail/96603 x},
   ) {
   print qq{<<$_>>};
   print qq{MATCH '$&'} if
     /^.*?(?:\b|_)$parse1(?:\b|_).*?(?:\b|_)$parse2(?:\b|_).*?$/m;
   print '';
   }
"
perl version: 5.008009

<<xxx
/newsearch/detail/96603
 xxx>>

<<xxx
/newsearch/detail/96603x
 xxx>>

<<xxx
x/newsearch/detail/96603x
 xxx>>

<<xxx
x/newsearch/detail/96603
 xxx>>
MATCH 'x/newsearch/detail/96603'

<<bla vla/newsearch/detail/96603 x>>
MATCH 'bla vla/newsearch/detail/96603 x'