keywords missing from Wikipedia

It looks like Wikipedia could be greatly strengthened by the simply device of adding a section of keywords to every article. Just because an article is replete with an entity doesn’t mean a search for that entity will include that article. A good example is the article on Euler’s four-square identity, which is replete with sums of squares, but does not contain the phrase ‘sum of squares’, and so a search for ‘sum of squares’ would not include the article on Euler’s four-square identity.
keywords:
[wanted documentation feature]
[wanted documentation enhancement]
[missing feature]
[search criteria]

QUIP

College is just a disguised way of getting serious books into the hands of youth.
keywords:
[education]
[instruction]
[training]
[teaching]
[learning]
[study]
[curriculum]
[educator]