linux - grep exclude multiple strings -

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i trying see log file using tail -f , want exclude lines containing following strings:

"nopaging limit is"`  , `"keyword remove is"

i able exclude 1 string this:

tail -f admin.log|grep -v "nopaging limit is"

but how exclude lines containing either of string1 or string2.

two examples of filtering out multiple lines grep:

put in filename.txt:

abc def ghi jkl

grep command using -e option pipe between tokens in string:

grep -ev 'def|jkl' filename.txt

prints:

abc ghi

command using -v option pipe between tokens surrounded parens:

egrep -v '(def|jkl)' filename.txt

prints:

abc ghi

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