ما هو دعاء المناجاة المطلوب؟

If you are referring to a specific supplication named "Du'a al-Munajat" (the Supplication of Intimate Communion), there is no supplication by this exact name. However, if you are referring to intimate communion in general, then every supplication is considered an intimate communion with Allah the Almighty. The best supplications are those established in the Qur'an and Sunnah. The opening supplication (Du'a al-Istiftah) and Surat Al-Fatihah both include intimate communion. There are also many supplications authentically narrated in the Qur'an, such as: "Our Lord, grant us in this world [that which is] good and in the Hereafter [that which is] good and protect us from the punishment of the Fire." And in the Sunnah, there are many supplications, such as: "O Allah, I have wronged myself greatly..." and "O Allah, forgive me for what I have put forth and what I have delayed..." and "My Lord, help me and do not help against me..." It is recommended to consult authentic books of supplications.