search not working in Arabic books

Dear Mrawy,

We have tested with another file, and it gives different results (for example searching "ال" in yours it does not give all the expected results but in the attached one, the library can find more results)

It seems like the search is not working for some cases especially in the pdf you have sent, we have send the issue to our developers for more investigation; and we will get back to you as soon as possible.