Searching multiple patterns in the large file while keeping the line order of matches

[keitee]

Hello advanced users,

I am looking for help that will be greatly appreciated. Under usual cases, I have huge file and run regular expression to filter out lines that I'm interested to see. grep tools is fine and that's static and manual. Like to do the same using fzf where I can change search pattern and get the match result dynamically as I types in patterns. Have tried "BLines" in fzf and two problems; 1) can use OR operator but able to search paragraph for example, "this is a message" and 2) when use OR, the result doesn't keep the line number of the matched from the file in order.

Any help or idea please

Many thanks