"Скачать книгу: Трансформаторы." (Download book: Transformers.)
"Поиск и загрузка литературы по трансформаторам." (Search and download of literature on transformers.) kniga transformatory skachat
"Где можно скачать книгу о трансформаторах?" (Where can I download a book about transformers?) "Скачать книгу: Трансформаторы
If you are looking for a way to turn that search query into a proper, natural-sounding sentence in Russian, here are a few ways to phrase it depending on what you need: natural-sounding sentence in Russian
"Я хочу скачать книгу про трансформаторы." (I want to download a book about transformers.)