String.find's values into an array

[FlashFlame_Roblox (LocalPlayer)]

I’m trying to find a specific word in a text using string.find. But because there are too many words that I need to find, I want to shorten it. So how do you turn this:

local start, ending = string.match(s1, "a phrase")
local start2, ending2 = string.match(s2, "another phrase") --s1, s2 are strings
-- more lines that is like above

into an array?

[JayzYeah32]

Link to a similar question: here

Edit: summary to that similar question:

@prepsure

local function findAll(str, sub)
	local found = 0
	local positions = {}
	while(found)do
		found = found + 1
		found = str:find(sub, found)
		table.insert(positions, found)
	end
	return positions
end

string.find has another parameter that will look for the substring you provide it starting at that position
ex: string.find(str, sub, 2) will never find the substring if it starts at position 1