NW5/CO5875 & NW6/CO5876 are scheduled flights for
passengers, while TH, TO, AIB, Y8 & RH are cargo/freighter
flights.
Codeshare freighter flights unlike SQ7835/JL6693 from
Osaka-Kansai.
VF32 is from S'pore (Seletar Airport), SAF8519 for Army Training
& even PMT flights. (PMT: Progress Multitrade, IATA Code:
U4)
Do you mean FINNAIR as Finnish Airline? I know it operates from SG
to BKK because the flight has a stopover in Singapore and in
transit to Bangkok. 
Another transit cargo flight is JAL Airlines, flight JL6669 from
Tokyo-Narita, stopover in Singapore and arrives at Kuala Lumpur.
Once, LD096 goes to Batam.
Delayed flights marked with a D, (eg Y8 7974D),
had been re-timed and depart later.
On 12 Nov, NW908 will be going to ILN via Bangkok &
Tokyo-Narita, as well as AIB102 to Sydney. (ILN:
Wilmington, Airborne Airpark Airport)
GY19 & GY31 from Jakarta-Halim & IMT326 from Phnom Penh are
the unknown codes to some people.
(GY: Tri-MG Intra Asia Airlines PT,
IMT: Imtrec Aviation)
There is also special flights with codes like SWORDFISHZ5,
TRUMPETZ5, SUPREMEZ5, SPIDERZ5, CONDORZ5, etc, as well as training
flights (eg. TN44), Test Flights (eg. 9VSPB) & Air Test by
FedEx (eg. FX9417).

I think KA9228 is from Hong Kong to Singapore, am I right? If I'm
not wrong, it is a cargo flight. (Dragonair (KA) mainly serves
China & Hong Kong and cargo flights mainly for example to New
York-JFK or Amsterdam)