The present disclosure provides a method for searching related terms using an electronic device. The method adds time stamps to one or more electronic documents, and obtains related terms by calculating a relevance score between every two terms of the electronic documents within a specified time range. The method further calculates a time gap between each related term and a preset query term, obtains updated related terms that have a time relationship with the preset query term by removing specified related terms whose time gap is greater than a preset value, and obtains search results from a data source by performing a search operation according to the updated related terms.