Number of keywords allowed?


We are trying to develop a webcrawler to collect some tweets from certain UserID for the research purpose. Does anyone know if there are any limitations in terms of the number of keywords that can be used on the webcrawler at one time? For example, we want to use many userIDs as keywords to collect some necessary tweets. However, it seems that the crawler that we developed can only take in 10 to 20 keywords at a time. Any tips?