Vol. 0 No. 0 1959 † †† †† †† Topic-oriented Term Extraction and Term Clustering for Query Focusing Hiromi Wakaki,† Tomonari Masada,†† Atsuhiro Takasu†† and Jun Adachi†† We often use search engines with queries consisting of few terms. Such short queries can be ambiguous, and it is difficult for users to select appropriate query terms. Accordingly, existing search engines may not avoid showing search