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):

div.style.padding = paddingBuf.join(" ");
        if (transformBuf.length) {
          div.style.transform = transformBuf.join(" ");
        }
      } else {
        div.style.padding = null;
        div.style.transform = divProps.originalTransform;
      }
    }
  }
}
/**
 * @param {TextLayerRenderParameters} renderParameters
 * @returns {TextLayerRenderTask}
 */
function renderTextLayer(renderParameters) {
  const task = new TextLayerRenderTask({
    textContent: renderParameters.textContent,
    textContentStream: renderParameters.textContentStream,
    container: renderParameters.container,
    viewport: renderParameters.viewport,
    textDivs: renderParameters.textDivs,
    textContentItemsStr: renderParameters.textContentItemsStr,
    enhanceTextSelection: renderParameters.enhanceTextSelection,
  });
  task._render(renderParameters.timeout);
  return task;
}
export { renderTextLayer };