You can specify fields and keywords with AND/OR operators for advanced search. Check some examples below:
1 To search for entries where ailment contains fever and utilizedPart contains root or stem:
ailment:fever AND utilizedPart:(root OR stem)
2 To narrow down previous search only for Acoraceae family:
ailment:fever AND utilizedPart:(root OR stem) AND
familyName:Acoraceae *Field names should be
camelCase and operators(AND/OR) should be
CAPITALIZED