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Now this lesson about Truncation. Truncation is —using a wildcard at the end of a root word to search multiple variations of that root word. Check a database's help section to identify what symbol is used for a wildcard.The example: protect* OR conserv* OR regulat* would retrieve multiple spellings of these synonyms. Some databases may allow you to use truncation at the beginning of words or within words (this is called internal truncation). Consult the help files in the database to determine the availability of this feature.

Example of Truncation is expands the search to locate all words beginning with the same root. Example: teen* will return teen, teens, teenage, teenager, etc.)
  —wom?n will return woman, women, and womyn.
It will be happen when we used in the middle of a word to match usually known variants of a term.
In addition, Phrase Searching is —when you use a string of words (instead of a single word) to search with. Usually phrase searching will be happen —by using phrase searching  and you will be retrieve fewer results. For the database to understand your search, you should put your phrase between brackets ( ) or inverted commas ".Than you try type your search as follows:

OLD / NEW