The word(s) "sphere" appears 2 time(s) in 2 verse(s) in Quran in Mohsin Khan translation.

(1) Alif-Lam-Ra. [These letters are one of the miracles of the Qur'an and none but Allah (Alone) knows their meanings]. (This is) a Book, the Verses whereof are perfected (in every sphere of knowledge), and then explained in detail from One (Allah) Who is All-Wise Well-Acquainted (with all things).

(2) Those (Muslim rulers) who, if We give them power in the land, (they) enjoin Iqamat-as-Salat [i.e. to perform the five compulsory congregational Salat (prayers) (the males in mosques)], to pay the Zakat and they enjoin Al-Ma'ruf (i.e. Islamic Monotheism and all that Islam orders one to do), and forbid Al-Munkar (i.e. disbelief, polytheism and all that Islam has forbidden) [i.e. they make the Qur'an as the law of their country in all the spheres of life]. And with Allah rests the end of (all) matters (of creatures).