The query you type in can be a single word or groups of words. If you type in a group of words, documents containing any of these words will be returned. If you want to search for a phrase, it needs to be enclosed in double quotes. There can be more than one word in the query with each term separated from the others by any combination of operators (and, not, or). Simply type your query into the text box and click on the search button.

Examples:

"carbon particulates"

Only those documents that contain the phrase "carbon particulates" will be found. This means that the word "particulates" must appear right after the word "carbon" in order for it to match the search.

carbon and particulates

This search will find only the documents that contain both the word "carbon" and "particulates".

carbon or particulates

This search will find documents that just contain the word "carbon", just the word "particulates", and any documents containing the two words together.

carbon not particulates

This would find all of the documents that have the word "carbon" but do not also have the word "particulates".

carbon not particulates and "coal deposits"

This would give you all of the pages the contain the word "carbon" and the phrase "coal deposits", but only if the word "particulates" didn't also appear.