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)

return this._pageMatches;
  }
  get pageMatchesLength() {
    return this._pageMatchesLength;
  }
  get selected() {
    return this._selected;
  }
  get state() {
    return this._state;
  }
  /**
   * Set a reference to the PDF document in order to search it.
   * Note that searching is not possible if this method is not called.
   *
   * @param {PDFDocumentProxy} pdfDocument - The PDF document to search.
   */
  setDocument(pdfDocument) {
    if (this._pdfDocument) {
      this._reset();
    }
    if (!pdfDocument) {
      return;
    }
    this._pdfDocument = pdfDocument;
    this._firstPageCapability.resolve();
  }
  executeCommand(cmd, state) {