You can get into,
375 Deniyaya - Galle
(via Galle - Dewata - Bogahagoda - Hawpe - Imaduwa - Kananke - Akuressa - Pitabeddara - Morawaka - Kotapola - Deniyaya )
375/2 Akuressa - Galle
(via Galle - Dewata - Pilana - Bogahagoda - Hawpe - Imaduwa - Kananke - Henegama - Akuressa)
375/3 Imaduwa Galle
(via Galle - Dewata - Pilana - Padinnoruwa - Bogahagoda - Hawpe - Pangirihena - Imaduwa)