Many VK uploads are home-scanned copies. Use or Microsoft Lens to re-capture clear pages. Alternatively, search for the "digital edition" (less common).
also hosts a comprehensive collection of German learning materials, including the PDF and audio tracks split into two CDs. begegnungen a2 pdf vk
However, original copies can be expensive (€20-€25 per book) and international shipping is often a nightmare. This is where the search term becomes a goldmine. Many VK uploads are home-scanned copies