1. A computer-implemented method for facilitating a semantic search based on one or more previously analyzed and indexed corpuses of natural language texts, the method comprising: identifying the one or more previously analyzed and indexed corpuses of natural language texts, each corpus including a plurality of sentences and indexes where indexes include indexes of meanings of linguistic parameters of the sentences and of their lexical units and their relations; wherein the linguistic parameters comprise parameters determined based on syntactico-semantic analysis of at least one sentence in the corpuses; and the syntactico-semantic analysis of the at least one sentence comprises performing a rough syntactic analysis of the at least one sentence generating a graph of generalized constituents of the at least one sentence; performing a precise syntactic analysis on the graph of generalized constituents by generating one or more syntactic trees and determining a syntactic structure of the at least one sentence, wherein the performing of the precise syntactic analysis comprises assessing parts of the one or more syntactic trees using prior and statistical ratings, and generating the one or more syntactic trees in an order of decreasing assessment; semantically analyzing the syntactic structure of the sentence generating a language-independent semantic structure of the at least one sentence; and generating one or more of the parameters based on the language-independent semantic structure of the at least one sentence; creating a query for searching sentences satisfying the query; searching for sentences of the previously analyzed and indexed corpuses satisfying the query; and displaying the sentences satisfying the query.
12. The method of claim 1 , wherein the query for searching is expressed in a natural language with requested parameters, a part of which may be not defined, or may be defined by means of variables, or may be defined as a range of meanings of these variables.