The Thunder Rift
Thunder Rift starts out with the Thunder Rift adventure and setting (TSR 9357) and continues with a short series of adventures that develop the encounter areas noted on the map in that book
Quest for the Silver Sword (TSR 9342)
Assault on Raven's Ruin (TSR 9350)
Sword and Shield (TSR 9387)
The Knight of Newts (TSR 9434)
Rage of the Rakasta (TSR 9435)
In the Phantom's Wake (TSR 9436)
Finally, DMR1 Dungeon Master's Screen (TSR 9437,black cover with green dragon art) include the mini-adventure Escape from Thunder Rift, which allows the heroes to venture out into the Grand Duchy of Karameikos (or wherever the DM wants to put them next).
The 1992 Character & Monster Assortment (TSR 9363) bears the now familiar Thunder Rift graphic presentation on its cover, but it's just a collection of fold up 3-d cardboard gaming miniatures and doesn't offer any new material specific to the Thunder Rift setting.
To those who just want to use the adventures but not the setting, the good news is that these are mostly generic adventures in the tradition of the other Basic D&D adventure modules, and adapt easily to wherever you want to place them.