This is the 7942nd most frequent German word.
hochhul
It seems "hochhul" may be a typo or incorrect word. Perhaps you meant "Hochschule," which means "university" or "college" in English.
In this sentence, 'hochhul' is used metaphorically to indicate enhancing or raising knowledge through reading.
Ich hochhul mein Wissen durch Bücher.
I elevate my knowledge through books.
Here, 'hochhul' is employed to mean physically lifting or elevating an item, the bag, to a higher location.
Er hochhul seine Tasche auf das oberste Regal.
He lifts his bag onto the top shelf.
This usage of 'hochhul' is abstract, referring to improving or heightening the emotional or psychological state of the audience.