There are hundreds of search engines all over the world. Scrub The Web, FindLink, PlanetSearch, MallPark, WebCrawler, Lycos, Northern Light, USA Online, and Peekaboo. Victoria Tourism Mall fee for this service. Some of these have developed their own search engines. This process should be repeated twice a year.
Some search engines drop web sites from time to time.
There is a war going on to position web pages at the top of searches and the tricks are many. To prevent this from happening, many of the top search engines change the rules regularly. In addition to that, I defy anyone to try to imagine the number of combinations that people can use to query a search engine. You just cannot plan for all the possibilities. So, the best you can do is register with these search engines.