For research projects in biology, it can be fruitful to use keywords such as:
- Species name (e.g. pyogenes)
- Protocol name (e.g. RNAi or RNA interference)
- Protein/s or gene/s of interest (e.g. Cas9 or topoisomerase)
The scientific literature is so active that typically, more specific terms will yield better results than general ones.
If you've found one key resource on your topic, searching for the keywords designated by the authors of that paper can also be a quick way to surface more sources. Mining the references/bibliography and citations are another good way to easily access more on-topic resources.