regex - AND operator for text search in Emacs -

i new emacs. can search text , show lines in separate buffer using "m-x occur". can search multiple text items using or operator : one\|two , find lines "one" or "two" (as explained on emacs occur mode search multiple strings). how can search lines both "one" , "two"? tried using \& , \&& not work. need create macro or function this?

edit:

i tried writing function above in racket (a scheme derivative). following works:

#lang racket  (define text '("this line number one"                "this line contains 2 keyword"                "this line has both 1 , 2 keywords"                "this line contains neither"                "another 2 & 1 words line"))  (define (srch . lst)    ; takes variable number of arguments   (for ((i lst))     (set! text (filter (λ (x) (string-contains? x i)) text)))   text)  (srch "one" "two") 

ouput:

'("this line has both 1 , 2 keywords" "another 2 & 1 words line") 

but how can put in emacs lisp?

regex doesn't support "and" because has limited usefulness , weird semantics when try use in nontrivial regex. usual fix search one.*two\|two.*one ... or in case of *occur* maybe search one , m-x delete-non-matching-lines two.

(you have mark *occur* buffer writable before can this. read-only-mode toggle; default keybinding c-x c-q. @ least in emacs, have move cursor away first line or you'll "text read-only".)

(defun occur2 (regex1 regex2)   "search lines matching both regex1 , regex2 way of `occur'. first (occur regex1) , (delete-non-matching-lines regex2) in *occur* buffer."   (interactive "sfirst term: \nssecond term: ")   (occur regex1)   (save-excursion     (other-window 1)     (let ((buffer-read-only nil))       (forward-line 1)       (delete-non-matching-lines regex2)))) 

the save-excursion , other-window bit of wart seemed easier hardcoding name of *occur* buffer (which won't true; can have several occur buffers) or switching there fetch buffer name, doing right thing set-buffer etc.