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)

}
      const match = {
        begin: {
          divIdx: i,
          offset: matchIdx - iIndex,
        },
      };
      
      if (matchesLength) {
        
        matchIdx += matchesLength[m];
      } else {
        
        matchIdx += queryLen;
      }
      
      
      while (i !== end && matchIdx > iIndex + textContentItemsStr[i].length) {
        iIndex += textContentItemsStr[i].length;
        i++;
      }
      match.end = {
        divIdx: i,
        offset: matchIdx - iIndex,
      };
      result.push(match);
    }
    return result;
  }
  _renderMatches(matches) {