The Google syntax for searching anchor text is inanchor: To search for Web pages that other pages have linked to using the word "widget," you'd type:
Note that there's no space between the colon and the keyword. Google only searches for the first word following the colon, unless you combine it with more Google syntax.
You can use quotes to include exact phrases, you can use plus sign for each additional word you'd like to include, or you can use the syntax allinanchor: to include all the words following the colon. Be aware that allinanchor: searches can't be easily combined with other Google syntax.
Putting It All Together
A search for "widget accessories," could be done as:
Anchor text plays an important roll in determining the placement of pages in Google search results. Learn more about why anchor text is important.