Finding text in a textlabel?

I need to find text in a text label to detect if a word has already been used.

			for i, v in pairs(playerBackpack:GetChildren()) do
				if loggedGui.Frame.items.Text:FindFirstChild(playerBackpack:GetChildren()) then
					else
					loggedGui.Frame.TextButton1.Visible = true
					loggedGui.Frame.items.Text = loggedGui.Frame.items.Text .. "\n" .. v.Name
				end
			end