When I search for an existing record (LNZ5-V3M) and enter the names exactly as indexed, it returns a No Results Found message.
Does this help? LNZ5-V3M = Marie-Rose Staelens?
https://www.familysearch.org/tree/find/name?self=Marie-Rose%7CStaelens%7C0%7C0&gender=female&birth=%7C%7C0%7C0&parent1=Marcel%20No%C3%ABl%7CStaelens%7C0%7C0%7Cmale&parent2=Lia%20Anna%7CViane%7C0%7C0%7Cfemale