No 8 is not Hemithea marina.
Very distinctive, blue-green, no discal mark no abdominal brown patch or margins.

No. 11. uncertain what family.

No. 12. Scopula but no match.

No 19 probably best left as Eublemma albostriata.

No. 21. Tochara creberrima. see post 11.

No. 23. Looks like Noctuid but no match.

No. 24. Looks like Crambid but parallel fasciae indicate Noctuid, somewhat like Naardia.

TL Seow