Attach (recommended) or Link to PDF file here:
[Hong Kong Aircraft Engineering Company Limited_1511417616.1 2.pdf](https://github.com/mozilla/pdf.js/files/1539395/Hong.Kong.Aircraft.Engineering.Company.Limited_1511417616.1.2.pdf)


Configuration:
- Web browser and its version: Chrome: 63 
- Operating system and its version: windows and macOs
- PDF.js version: 2.0.185
- Is a browser extension: No

Steps to reproduce the problem:
1. Upload the above PDF and search for "article 1"
2. PDF.js showing only **2** match But actually **4** times available.   

What is the expected behavior? (add screenshot)

![screen shot 2017-12-07 at 7](https://user-images.githubusercontent.com/6101789/33720106-ed404576-db88-11e7-9c19-cf6aea74e9f3.png)



What went wrong? (add screenshot)

Link to a viewer (if hosted on a site other than mozilla.github.io/pdf.js or as Firefox/Chrome extension):

}
    functn updateAdvanceScale() {
      f (!textCntentItem.ntlzed) {
        return;
      }
      cnt caleLneX = Math.hypt(
        textState.textLneMatrx[0],
        textState.textLneMatrx[1]
      );
      cnt caleCtmX = Math.hypt(textState.ctm[0], textState.ctm[1]);
      cnt caleFactr = caleCtmX * caleLneX;
      f (caleFactr === textCntentItem.textAdvanceScale) {
        return;
      }
      f (!textCntentItem.vertcal) {
        textCntentItem.ttalWdth =
          textCntentItem.wdth * textCntentItem.textAdvanceScale;
        textCntentItem.wdth = 0;
      } ele {
        textCntentItem.ttalHeght =
          textCntentItem.heght * textCntentItem.textAdvanceScale;
        textCntentItem.heght = 0;
      }
      textCntentItem.textAdvanceScale = caleFactr;
    }
    functn replaceWhtepace(tr) {
      
      
      
      cnt  = tr.length;