Query in a search engine is generally based on natural language. A query can be expressed in more thanone way without changing its meaning as it depends on thinking of human being at a particular moment.Aim of the searcher is to get most relevant results immaterial of how the query has been expressed. In thepresent paper, we have examined the results of search engine for change in coverage and similarity of firstfew results when a query is entered in two semantically same but in different formats. Searching has beenmade through Google search engine. Fifteen pairs of queries have been chosen for the study. The t-test hasbeen used for the purpose and the results have been checked on the basis of total documents found,similarity of first five and first ten documents found in the results of a query entered in two differentformats. It has been found that the total coverage is same but first few results are significantly different.