How with grep command exclude search in dubdirectory ?

[petrogromovo]

Hello,
Under Kubuntu 18 I use command

grep -Hrn 'backend' --include="*.vue" /mnt/_work_sdb8/wwwroot/lar/hostels2/resources/js/components/BS4

when I need to search for some string inside of a directory.

I search for an option to exclude “/admin/” subdirectory, something like (that does not work):

grep -Hrn 'backend' --include="*.vue" --exclude="*admin*" /mnt/_work_sdb8/wwwroot/lar/hostels2/resources/js/components/BS4

I found option to exclude :

grep "word1" | grep -v "word2"
grep -r 'wanted_pattern' * | grep -v 'unwanted_pattern'

But I failed combine it , like

grep -Hrn 'backend' --include="*.vue" /mnt/_work_sdb8/wwwroot/lar/hostels2/resources/js/components/BS4 | grep -v --include="*admin*"

Got message :

Usage: grep [OPTION]... PATTERN [FILE]...
Try 'grep --help' for more information.

Which is valid format ?

Thanks!

[spjackson]

But I failed combine it , like

grep -Hrn 'backend' --include="*.vue" /mnt/_work_sdb8/wwwroot/lar/hostels2/resources/js/components/BS4 | grep -v --include="*admin*"

grep -Hrn 'backend' --include="*.vue"  /mnt/_work_sdb8/wwwroot/lar/hostels2/resources/js/components/BS4 | grep  -v /admin/