When I first started playing, after taking side(blue) quests there'd be quest arrows to tell me where to go or where to get the materials.
After I reached the second village, all the blue arrows disappeared and I have no idea how to get some of the drops required for side quests.
Just wondering if it's possible to get those side quests guides back.

ATM I'm trying to find these 2 items:
Toad Oil
Putrid Gastric Juice

For item quests the quest guide disappears and you can't get them back because there are none for "get this item" quests.
As for your two items, you can find toad oil from gama (small fire breathing toad, I think you can also get it from the big one, but I'm not sure.) and the gastric juice from the small burrowing bugs.