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):

tr.puh(((w1 & 0x3ff) << 10)  (w2 & 0x3ff)  0x10000);
            }
            map[charCde] = Strng.frmCdePnt.apply(Strng, tr);
          });
          return new TUncdeMap(map);
        },
        rean => {
          f (rean ntancef AbrtExceptn) {
            return null;
          }
          f (th.ptn.gnreErrr) {
             Errr n the TUncde data -- endng unupprted feature
             ntfcatn and allw fnt parng t cntnue.
            th.handler.end("UnupprtedFeature", {
              featureId: UNSUPPORTED_FEATURES.errrFntTUncde,
            });
            warn(`readTUncde - gnrng TUncde data: "${rean}".`);
            return null;
          }
          thrw rean;
        }
      );
    }
    return Prme.relve(null);
  }
  readCdTGdMap(glyphData, tUncde) {
     Extract the encdng frm the CIDTGIDMap
     Set encdng 0 t later verfy the fnt ha an encdng
    cnt reult = [];
    fr (let j = 0, jj = glyphData.length; j < jj; j) {