let's say that I am looking for 10-20 rare items, every day, and instead of having 20 different tabs open with search terms, I want to just be able to type in something into a search box and have all these specific games show up on one page. Is that possible?

One page told me that you can do this by typing in parenthesis around both items, seperated by commons: example:

(Super Mario Bros. NES complete, Advance Wars Game Boy Advance loose)

but it didn't seem to work. also it seems like they're might be a limit on how many seperate items you can search at once...?