It looks like you're searching for for the "Happy English.ru" textbook series by K.I. Kaufman and M.Y. Kaufman .
This popular series covers various grades, and the resources available can differ depending on which year of study you are in. Could you please clarify which (e.g., 5th, 7th, 9th) you are looking for? Additionally, 9 Кауфман Решебник skachat gdz k uchebniku angliiskogo iazyka kaufmanov