Your search strategy could very depending on the database or resource you are using. Note that some of the resources now have AI Natural Language as a way to search. Some examples of traditional searches for physics include:
graphene Josephson junctions "falling chain"
"optical tweezers" (tunable OR automated)
nanotribology OR (nano* friction surface*)
These are searches that are examples of Boolean (AND, OR, NOT), truncation (*), and exact phrase searching (in quotes).