Learn Spanish (Spain): Busco piso en el centro. - I am looking for a flat in the center.

The verb buscar already means "to look for" or "to search for." Unlike English, you do not need to add a preposition like por or para after it. Saying busco por is a very common mistake for English speakers!

Why does it say piso instead of un piso?

In Spanish, when you talk about looking for, buying, or needing an unspecified item from a general category, you often drop the indefinite article (un or una). Because you are looking for a flat in general and not one specific flat, you just say busco piso.

I learned that piso means "floor." Why does it mean "flat" here?

In Spain, piso is the most common word used for a flat or apartment. In Latin America, people generally say apartamento or departamento, and reserve piso strictly for the floor you walk on or a level of a building.

Why do we use en el centro instead of al centro?

You use the preposition en here because it describes a static location, meaning the flat is located "in" or "at" the center. You would only use al (a contraction of a + el) if you were talking about movement towards a destination, such as voy al centro (I am going downtown).