using multiple meta_key and meta_value in query_posts

how can i use multiple meta_key and meta_value in query_posts?

For example, I want to find multiple content with two different meta_key and meta_value. How do I do this?

i using this code but not effective:

query_posts('meta_key=test2&meta_value=hello&meta_key=test2&meta_value=bye');

please help me…