I have problems using the ACM advanced search at https://dl.acm.org/search/advanced I only want to search for abstracts, so I choose the abstract field in the "Search within" block. To provide a simple example, I use the following search query:
change impact AND software AND graph AND algorithm
With that, I got 179 Results.
I double checked the results by looking in the first abstract (Multi-perspective change impact analysis using linked data of software engineering) and everything was fine. But in the second abstract (Change impact analysis for aspect-oriented software evolution) the terms for "graph" and "algorithm" are missing.
I did some testing with something like:
change impact AND (software OR artifact) AND scenario
and got results where the "scenario" term is missing in the abstract. My original search term is way more complex than that simple example.
So what I am missing or is the search engine broken?