Admin Commands Name Searching?

So in admin commands, you can type something like ":kill pla" and it would kill someone named "Player" how can I do this?

This is my script: (any help appreciated as usual)

local a = false
local oa = false
local pref = "."
local owners = {"Hyphonated", "Player"}
local admins = {"", ""}

game.Players.PlayerAdded:connect(function(p)
for _,owner in pairs(owners) do
	if p.Name == owner then
		oa = true
		a = true
		print(oa, a)
		end
end
end)

game.Players.PlayerAdded:connect(function(p)
for _,admin in pairs(admins) do
	if p.Name == admin then
		a = true
	end
end
end)

game.Players.PlayerAdded:connect(function(p)
	p.Chatted:connect(function(msg)
		if string.sub(msg, string.len(pref), 6) == pref.."kill " and a == true then
			if game.Players:FindFirstChild(string.sub(msg, 7, string.len(msg))) then
				game.Players:FindFirstChild(string.sub(msg, 7, string.len(msg))).Character.Humanoid.Health = 0
			end
		end
	end)
end)

words = {}

function findw(text, separator)
    local words = {}
    for word in text:gmatch("[^" .. " " .. "]+") do
        table.insert(words, word)
    end
    return words
end

Explaination, what this does is it seperates every space into a table so you can seperate and find the things so if it gives you part of name then you would do

function compare(word)
for i,v in pairs(game.Players:GetChildren()) do
if v:sub(1,#word):lower() == word:lower() then
break
return v
end
end

player = compare("devs") -- Not fully devSeldom ps not cap sensitive
print(player.Name) --Would print devSeldom since it found me

What this does is it compares the strings of the word you give it so example ^

adminkey = ";"
admincommands = {"kill", "teleport", "random"}
function findcommand(word, playername)
if word:sub(1,1) == adminkey then
for i,v in pairs(admincommands)  do
return v
break
end
end

would return the command

Example

local player = game.Players.LocalPlayer
repeat wait() until player.Character

local variables = {
Admins = ["devSeldom","Hyphonated"],
Commands = ["Kill"]
IsAdmin = false
FireCode = ":"
}

--Checks if the player is a admin
for i,v in pairs(variables.Admins) do
if player.Name == v then
variables.IsAdmin = true
end

--Finds the command
function findcommand(word, playername)
if word:sub(1,1) == adminkey then
for i,v in pairs(variables.Commands)  do
return v
break
end
end

--Finds player and returns it
function compare(word)
for i,v in pairs(game.Players:GetChildren()) do
if v:sub(1,#word):lower() == word:lower() then
break
return v
end
end

--Creates a table
function findw(text, separator)
    local words = {}
    for word in text:gmatch("[^" .. separator .. "]+") do
        table.insert(words, word)
    end
    return words
end

player.Chatted:connect(function(msg)
if variables.IsAdmin  == true then
chattable = findw(msg, " ")
command = findcommand(chattable[1])
if command == "Kill" then
player1 =  compare(chattable[2])
if player1 ~= nil then
player1.Character.Humanoid.Health = 0
end
end
end
end)