Each of Stellar's operations have unique causes of failure, and these result codes will help you diagnose and address the origins of issues.

Operation-Specific Result Code Types
Create Account
Payment
Path Payment Strict Receive
Path Payment Strict Send
Manage Sell Offer
Manage Buy Offer
Create Passive Sell Offer
Set Options
Change Trust
Allow Trust
Account Merge
Manage Data
Bump Sequence

For operations that aren't in this list, you can usually refer to their corresponding entries in the List of Operations which will enumerate the failure cases and corresponding result codes.