The best way to search the old articles is to use the Google search widget.
There are tags under each article and those keyword categories can be used to search for other articles but the results are listed in full article format. Putting the keywords and combinations of keywords into the searchbox delivers brief targeted results. 10 articles on one page with a link and short description. There are a list of the primary labels at the bottom of the left column. Those keywords can also be used to filter your searches.
For example you could put in
cancer lab on a chip
china gdp forecast
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