What are the commentaries on the books that combined the two Sahihs, or the books that dealt with their gharib (unfamiliar words) and mushkil (difficult passages)?

All commentaries on Sahih al-Bukhari and Sahih Muslim are considered commentaries on books that combine the two Sahihs. Scholars have dedicated special commentaries to these works to facilitate their benefit, some of which are printed and some unprinted.

Among the printed books in this regard are: - "Tafsir Gharib ma fi al-Sahihayn al-Bukhari wa Muslim" by al-Humaydi. - "Al-Ifsah an Ma'ani al-Sihah" by Abu al-Muzaffar Yahya ibn Hubayra. - "Kashf al-Mushkil min Hadith al-Sahihayn" by Ibn al-Jawzi. - Ibn al-Salah's glosses on "Al-Jam' bayn al-Sahihayn li al-Humaydi". - "Mabariq al-Azhar Sharh Mashariq al-Anwar" by Ibn al-Malik al-Kirmani. - "Multaqa al-Nahrayn Sharh al-Jam' bayn al-Sahihayn" by Ahmad al-Saq'ub on "Al-Jam' bayn al-Sahihayn li al-Huffaz" by Shaykh Yahya al-Yahya. - "Al-Manhal al-Jari al-Muntaqa min Fath al-Bari Sharh Kitab al-Jam' bayn al-Sahihayn". - "Mashariq al-Anwar ala Sihah al-Athar" by Qadi Iyad, which explains the vocabulary of the two Sahihs and al-Muwatta.