In such cases, the user must think of the precise word that is used within the material. If he does not type in the exact word, the information will not be found. Finally, he chooses a word that brings up some information. After reviewing each of these documents, he is dismayed to find that only five pages actually contain what he was looking for. Nonetheless, they do not help the user to narrow down her search.
Information retrieval is still quite often vague and inconsistent.