How to create the query with multiple node types

Hi,

I am having an issue in creating a query to search multiple node types.

The requirement is to query documents/pages of the type dam:Asset and cq:Page present under a path.

I tried the following code snippet with no luck .

path=/content

1_type=cq:Page

2_type=dam:Asset

property=jcr:content/metadata/@cq:tags

property.1_value=<tag Name>

I was able to write a query with single type. However i could not find any documents/ materials with multipe types as shown above.

Thanks in advance.

Regards

Sudhi