Abstract: The search engine provides a method and apparatus for receiving long queries, assigning a weight to each relevant word of the query, allowing a user to reformulate the query before and/or after search on the basis of the weight of each word computed by the algorithm. The search engine further provides methods for decomposing a long query into several short queries based on the importance of terms computed by the algorithm. These generated queries are submitted to existing search engine(s) producing several ranked outputs, and the obtained ranked outputs are merged into one final ranked output.