On top of Odoo leave management you can use Ktree’s custom module to use different leave types in your organization.
For this navigate to Odoo >> Human resource>> Configuration >>Leave type- create and follow the instructions.

Input the leave type name example- Vacation leave.

Insert Leave lines with leave year e.g. LY2016
Max Encashment leaves e.g. Number of days 4

Leave type code- paid/sick/special/lop

Apply code based on your preference types.