Grollige.com doesn't currently have the level of resources enjoyed by the likes
of Google, MicroSoft and DuckDuckGo.
This means that some advanced features which are common in other search engines cannot yet be used here. The ability to analyse complex word structures is the most obvious at the moment.
Here are some suggestions on how you might currently get better search results on Grollige:
Also, Grollige doesn't yet support 'AND', 'OR', 'SITE:' or other features.
The reason for these current shortcomings is lack of available people to work on synonyms.
The simple and easy way to approach this problem would be to just automate a Thesaurus. The problem with that approach is that a search engine needs to be able to understand what you are actually asking and this is much more complicated.
Just replacing individual words with individual synonyms would be a great solution for computers, but no so good for people.
Web pages are written by people, not computers. Web searches are conducted by people, not computers.
In future, if enough people decide to support Grollige financially (hint!) then this problem can be overcome. All things are possible, they just require resources.