Display_settings.search_all_terms = split(Display_settings.search_all_query)

  local index = contents:find(Display_settings.search_all_query, 1, --[[literal pattern]] true)
  if index then

  if match_all(contents, Display_settings.search_all_terms) then

    while index do

    local index = 0
    while true do
      index = find_any(contents, Display_settings.search_all_terms, index+1)
      if index == nil then
        break
      end

      index = contents:find(Display_settings.search_all_query, index+1, --[[literal pattern]] true)

  end
end
function split(s)
  local result = {}
  for sub in s:gmatch("%S+") do
     table.insert(result, sub)
  end
  return result
end
function match_all(s, subs)
  for _,sub in ipairs(subs) do
    if s:find(sub, 1, --[[literal pattern]] true) == nil then
      return false
    end
  end
  return true
end
function find_any(s, subs, start)
  local result = nil
  for _,sub in ipairs(subs) do
    local i = s:find(sub, start, --[[literal pattern]] true)
    if i then
      if result == nil then
        result = i
      elseif i < result then
        result = i
      end
    end

  return result