Here, i have attached the PDF, that PDF document contains "Nudi" as an embedded font. When i searching the particular word (that in Nudi font), the search result selecting the word that context next to the exact word.

Link to PDF file (or attach file here):
[sample_pdf.zip](https://github.com/mozilla/pdf.js/files/229582/sample_pdf.zip)

Configuration:
- Web browser and its version: Mozilla 45.0.2
- Operating system and its version: Windows 7
- PDF.js version: 1.4.20-disc

What is the expected behavior? (add screenshot)
![find_01](https://cloud.githubusercontent.com/assets/17423938/14704922/c2e67f2c-07d4-11e6-9320-9aed2578d377.png)

}
        if (
          entireWord &&
          !this._isEntireWord(pageContent, matchIdx, subqueryLen)
        ) {
          continue;
        }
        
        matchesWithLength.push({
          match: matchIdx,
          matchLength: subqueryLen,
          skipped: false,
        });
      }
    }
    
    this._pageMatchesLength[pageIndex] = [];
    this._pageMatches[pageIndex] = [];
    
    
    this._prepareMatches(
      matchesWithLength,
      this._pageMatches[pageIndex],
      this._pageMatchesLength[pageIndex]
    );
  }
  _calculateMatch(pageIndex) {
    let pageContent = this._pageContents[pageIndex];
    let query = this._query;
    const { caseSensitive, entireWord, phraseSearch } = this._state;