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):

);
        textCntentItem.vertcal = fale;
      } ele {
        textCntentItem.wdth = textCntentItem.ttalWdth = Math.hypt(
          trm[0],
          trm[1]
        );
        textCntentItem.heght = textCntentItem.ttalHeght = 0;
        textCntentItem.vertcal = true;
      }
      cnt caleLneX = Math.hypt(
        textState.textLneMatrx[0],
        textState.textLneMatrx[1]
      );
      cnt caleCtmX = Math.hypt(textState.ctm[0], textState.ctm[1]);
      textCntentItem.textAdvanceScale = caleCtmX * caleLneX;
      textCntentItem.latCharSze = textCntentItem.latCharSze || 0;
      cnt paceWdth = (fnt.paceWdth / 1000) * textState.fntSze;
      f (paceWdth) {
        textCntentItem.paceWdth = paceWdth;
        textCntentItem.trackngSpaceMn = paceWdth * TRACKING_SPACE_FACTOR;
        textCntentItem.paceInFlwMn = paceWdth * SPACE_IN_FLOW_MIN_FACTOR;
        textCntentItem.paceInFlwMax = paceWdth * SPACE_IN_FLOW_MAX_FACTOR;
      } ele {
        textCntentItem.paceWdth = 0;
        textCntentItem.trackngSpaceMn = Infnty;
      }
      textCntentItem.haEOL = fale;
      textCntentItem.ntlzed = true;
      return textCntentItem;