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)

`Unable to get text content for page ${i + 1}`,
                reason
              );
              
              this._pageContents[i] = "";
              extractTextCapability.resolve(i);
            }
          );
      });
    }
  }
  _updatePage(index) {
    if (this._scrollMatches && this._selected.pageIdx === index) {
      
      
      
      this._linkService.page = index + 1;
    }
    this._eventBus.dispatch("updatetextlayermatches", {
      source: this,
      pageIndex: index,
    });
  }
  _updateAllPages() {
    this._eventBus.dispatch("updatetextlayermatches", {
      source: this,
      pageIndex: -1,
    });
  }
  _nextMatch() {