sorting by location has only been useful to a certain extent. plenty of orders show under the Misc location. and not all orders will specify under what conditions you need to enter that location with.
you CAN use Google, but hardly anything useful ever shows. i suspect most useful information is probably in Japanese.
http://arkive.info/enemies/
https://pso2.arks-visiphone.com/wiki/Main_Page
those are what i have found so far, but information on enemy location seems to be lacking.
( okay, but i am actually really bad at searching... for some reason. FML )
that image that is linked above... that little "SELECT CLIENT ORDER" window on the right only shows when accepting a Recommended Quest. furthermore, it only shows when accepting from an NPC at the counter. if you just leave out through the door, or simply accept an Expedition at the counter, the window doesn't show. ( also doesn't show when using the data cube on the Gateway Ship ) and you can't accept any new Client Orders after leaving the lobby. that in-game image is grossly misleading as of to what is actually done AND what can be done.
the game doesn't make it very clear that certain Client Orders can only be completed when on certain missions/quests. some are clear, while others are sorely lacking. not saying you need to do an Advanced Quest and such. not all Client Orders will mark a thing next to a mission/quest when browsing. even if you do try an Advanced Quest at the location of your enemy, you may not realize that that "???" indicates a random enemy will appear, get the wrong encounter and not even try it again. ( i don't know if it is random )
`
now, with that being said... i am no stranger to difficult questing... Everquest anyone?
`
at any rate, a player can be easily left hunting down an enemy for hours because of the obtuse text in this game. i don't mind difficult questing, but this game has it bad... it is one thing to be left in the dark, but another to be constantly sent on a fools errand.
`
well, just my 2-cents. enjoy and thank you!
never mind any of that... most of it still true, but none of it matters. just see below and look when you accept something, before accepting check the menu for "Quest Log". this honestly appears to be everything that you could ever need. combine with the location sorting of Client Orders, all should be good! lols.