etnam war", the search will only find you the papers that have in them "vietnam" AND "war". This is the best match type in most cases, but if you have a special search specification, our search allows you to use the OR and NOT Boolean match types as well. Russia OR Communism - Papers that contain either the word "Russia" or "Communism". Russia NOT Communism - Papers that contain the word "Russia" but not "Communism" General Search Tips Search Tips - A few quick things to remember before searching. Avoid using very common words in your query as they will be ignored as stopwords. All queries are parsed as case-insensitive so don't worry about case matching. The best results are found by using one or several specific keywords in your query. Please do not use quotes or other symbols in your query as they may hurt your results. ...
