For schools you have 2 places with "المدرسة الابتدائية عين الصابون", "المدرسة الابتدائية 2 مارس 1934" for example.
About post offices, 1 possibilities exist (like "مكتب بريد الزريبة 1122").
Are you looking for an apartment for sale/rent? Or interested by a house? You can check that on Mubawab.