Compatibility summary
Your Philippines plug may fit in Chad outlets, as both use at least one common plug type.
Plug comparison
Philippines plug types: A B C
Chad plug types: C E F
Both countries share at least one plug type (A B C and C E F), so some plugs may work without an adapter. Check your appliance.
Voltage comparison
Philippines: 220V, 60Hz
Chad: 230V, 50Hz
Voltage difference is within a range many devices tolerate; check your appliance label.