How to list articles whose titles contain specific keywords

support
6 
{{ $p := slice }}
{{ range where .Site.RegularPages "Section" "post" }}
  {{ if in (lower .Title) "how to" }}
    {{ $p = $p | append . }}
  {{ end }}
{{ end }}

{{ range (.Paginate $p 14).Pages }}
  <h2><a href="{{ .RelPermalink }}">{{ .Title }}</a></h2>
{{ end }}