Unable to reach some stop points when using route network analysis

[FailaqulHaq]

I am currently have a research about route analysis to pick up some waste at around 20 hospital points in Surabaya. I am using OSM street data to create the network datasets.  but when I run the route analysis in "preserve first stop" mode the route output doesn't reach at some point. and I got these warnings. I have tried to set the snap offset parameter to 3 meters to make the point closer to network. 

 what should I do to fix this ?

Solve
=====================
Parameters

Input Network Analysis Layer Route4
Ignore Invalid Locations SKIP
Terminate on Solve Error TERMINATE
Simplification Tolerance
Network Analyst Layer Route4
Solve Succeeded true
Overrides
=====================
Messages

Start Time: 19 July 2022 17:24:53
Location "RUMKITAL Dr. Ramelan Surabaya" was unreached.
Location "Rumah Sakit Islam Jemursari Surabaya" was unreached.
Location "Rumah Sakit Universitas Airlangga" was unreached.
Location "National Hospital" was unreached.
Location "Rumah Sakit Surabaya Medical Center" was unreached.
Location "Rumah Sakit Spesialis Husada Utama" was unreached.
Location "Rumah Sakit PHC Medical Centre" was unreached.
Location "Rumah Sakit Umum Daerah Dr. Soetomo" was unreached.
Location "Rumah Sakit Mitra Keluarga" was unreached.
Location "Rumah Sakit Surabaya Medical Center" was unreached.
Location "RSU Bhakti Rahayu" was unreached.
WARNING 030025: Partial solution generated.
Succeeded at 19 July 2022 17:24:54 (Elapsed Time: 0.27 seconds)