OracleTextSearch can it handle dashes?

I am wondering if OracleTextSearch has any problems with dashes.  An example of the query I am running is below.  If I only search for xAudience<contains> `Public` it brings back the correct number.  If I search with xAudience<contains>`IND-S`, it brings back content that has xAudience set to    `IND-T` or `IND-P`, and the `IND-S` is not contained in the field.  So that content should not come back.

xSite<matches>`INDIVIDUAL`<and>(xAudience<contains>`Public`<or>xAudience<contains>`IND-S`)<and>dextension<matches>`pdf`<and><NOT>xOmitFromSearch<matches>`Yes`<and>(xDocName<contains>`ppo`<or>xKeyWords<contains>`ppo`<or>xSummary<contains>`ppo`<or>dDocTitle<contains>`ppo`)