1. A method for retrieving information from a semantic database having a plurality of semantic data, comprising: selecting, by one or more processors, a hub that is resolved with a number of semantic data based on a resolution rule, when the number of the semantic data is greater than a threshold in an offline environment; calculating, by one or more processors, a semantic data set that is associated with the hub based on a searching approach and the resolution rule in the offline environment; indexing, by one or more processors, the semantic data set in the offline environment; modifying, by one or more processors, the semantic database to include the semantic data set in the offline environment; and retrieving, by one or more processors, information from the semantic data set in an online environment.