If you want plural forms only, make your keywords plural. A few search engines support truncation or wildcard features that allow variations in spelling or word forms. A web page is composed of a number of fields, such as title, domain, host, URL, and link. Searching effectiveness increases as you combine field searches with phrase searches and Boolean logic. In addition to the title search, other helpful field searching strategies include the domain search, the host search, the link search, and the URL search.
Most websites originating outside the U.S. have a country domain indicating the country of origin.
For a list of all country domains, visit this site. Because the major search engines do not always log an entire website, use an internal search engine, if the website has one, for best results. A URL search can narrow very broad results to web pages devoted to the keyword topic. For example, if you have a home page and you are wondering if anyone has put a link to your page on their website, use the Link search. Researchers use link searches for conducting backward citations.