If you can’t find an entry that you believe should be in a collection, try browsing the collection, or at least narrow your search to just a surname.
I had a funeral notice for one of dad’s cousins, Ivy Henrietta White, nee Harley, which indicated she was buried at Warragul Lawn Cemetery. When I searched for Ivy White on the Warragul Cemeteries Trust website, the entry didn’t come up. I therefore tried searching just for the surname White, and browsed through the entries. Her entry had her surname as White (Harley).