Programming better search engine for help section

I am improving the search function of the help section since I am expecting this section to grow exponentially next version.

I found some issues that are hard to solve :p.

For example, I find out that singular of plural of a search query gives a different set of results.

Like "strategy" or "strategies" tends to have a total different result. Mostly, if a user gives the singular form, he will probably also find the plural form as well, but this is not always true.

Programming a search engine is harder than I thought!

Respect to Google!