I’ve never heard “try up.” I don’t think it is used, at least in American English. There is a vulgar, slang use of “try her up” that is defined in urbandictionary.com.

'Try out' is a very common everyday phrasal verb. There is no equivalent phrasal verb 'try up'. You can try out a new idea, for example, but you can't 'try up' a new idea. This makes no sense. Please don't invent phrasal verbs! The phrasal verbs which do exist are already confusing enough for students. Don't confuse yourself unnecessarily by worrying about ones which don't even exist....

No such phrasal verb as Try up. Closely spelled phrasal verbs 1) Tie up- join together( The 2 organizations tied up there operations) finish up some unfinished tasks( I have finally tied up my loose ends) busy with( Yesterday I was tied up in meetings all day)