Vertex search Configuration - Stemming / Boost filters

[premyb]

Hi,

  I'm trying to set up Vertex AI Search (Not Chatbot) for our documentation site (as Sitesearch/PSE is being shutdown). Few questions

- How do I set certain words NOT to be stemmed? For eg: yugabyted is automatically converted to YugabyteDB. I don't want this to happen. (Specifying within quotes as "yugabyted" doesn't work)

- For Boost/Bury, how do I create a filter where the URL path matches a pattern 

- How to deeplink to specific headers within the page?. How do I identify whether it is a hit on a header or not ?

Thanks in advance.