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):

if (task._canceled) {
    return;
  }
  const textDivs = task._textDivs;
  const capability = task._capability;
  const textDivsLength = textDivs.length;
  
  
  if (textDivsLength > MAX_TEXT_DIVS_TO_RENDER) {
    task._renderingDone = true;
    capability.resolve();
    return;
  }
  if (!task._textContentStream) {
    for (let i = 0; i < textDivsLength; i++) {
      task._layoutText(textDivs[i]);
    }
  }
  task._renderingDone = true;
  capability.resolve();
}
function findPositiveMin(ts, offset, count) {