маяться(one's/one's own I have been chasing my tail about the problem in the department for two days, but I can manage to find a suitable solution. VLZ_58)
не врубиться(Посмотрела новый фильм Сокурова-и, если честно, не врубилась. I saw Sokurov's new film, but to be honest, I didn't get it.; не понимать to not understand; something)