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This paper discusses possible assisting approaches with that the search engine indicates additional keywords for searching the desired documents after the first keyword is specified by the user. Effectiveness of a new idea to utilize a frequency distribution of terminologies used in all the database documents was evaluated, showing a promising indication that the approach is useful for suggesting good candidate terminologies for secondary keywords. The paper indicates necessary steps towards building of a more efficient search engine including establishment of a solid mathematical or statistical foundation for determining a group of meaningful terminologies from any arbitrary database, and combination with other approaches for augmenting searching performance.
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