Last year Economics of Governance (Springer) published an article that I co-authored titled "Political determinants of fiscal transparency: a panel data empirical investigation". Google Scholar appears to find the article only if I search for the complete title or search for political determinants of fiscal transparency. If I enter any other combination of words of the title or the keywords in the search query the article disappears from the results. Even more strangely, Google Scholar does not find the article when I look for political determinants fiscal transparency. How is it possible that the word of makes such a difference for Google Scholar?
P.S. I wrote to the journal and they replied that this is how it is supposed to work, but this answer is not really convincing.