1. A method of operating on-line search services, the method comprising: receiving, from a user, a search word for searching communities; conducting a search using the search word, thereby locating a plurality of communities, wherein the search is conducted using a computing device comprising a processor and a memory; determining a reliability value for each of a plurality of located communities using at least one reliability factor selected from the group consisting of a community user reliability index and a community activity index, the reliability value being indicative of how reliable information from each community is, wherein the community user reliability index for a first one of the plurality of located communities is determined based on reliability indices of users registered with the first community, wherein the community activity index for the first community is determined based on activities of users registered with the first community; formulating a search result page such that at least part of the plurality of located communities are arranged based on the reliability values thereof on the search result page; and providing the user with the formulated search result page.
1. A method of operating on-line search services, the method comprising: receiving, from a user, a search word for searching communities; conducting a search using the search word, thereby locating a plurality of communities, wherein the search is conducted using a computing device comprising a processor and a memory; determining a reliability value for each of a plurality of located communities using at least one reliability factor selected from the group consisting of a community user reliability index and a community activity index, the reliability value being indicative of how reliable information from each community is, wherein the community user reliability index for a first one of the plurality of located communities is determined based on reliability indices of users registered with the first community, wherein the community activity index for the first community is determined based on activities of users registered with the first community; formulating a search result page such that at least part of the plurality of located communities are arranged based on the reliability values thereof on the search result page; and providing the user with the formulated search result page. 15. The method of claim 1 , wherein formulating comprises identifying the first community having a reliability value smaller than a pre-determined value, and excluding the first community on the search result page.