1. A method comprising: obtaining one or more resource identifiers extracted from a content page obtained over a computer network; filtering out one or more irrelevant resource identifiers from the one or more extracted resource identifiers based on a given resource identifier irrelevance pattern, wherein the given resource identifier irrelevance pattern is inclusive or exclusive and further wherein the given resource identifier irrelevance pattern is specified by a user based on user domain knowledge of content being sought; classifying the one or more resource identifiers remaining after the filtering step into one or more classifications from a given set of classifications, wherein the classifying step is conducted in accordance with one or more classification rules derived from the user domain knowledge of content being sought; inserting the one or more classified resource identifiers into a seed set of resource identifiers associated with dedicated network search components corresponding to respective ones of the classifications of the one or more classified resource identifiers; and dynamically allocating one or more resources for network searching among the dedicated network search components based on the one or more inserted resource identifiers; wherein the above steps are performed by one or more processing devices each comprising a processor operatively coupled to a memory.