hi victoria, i can help you only for hoya chingungensis because i have it..

it wants humidity of soil and loves cool..

sunlight filtered from a window.

sorry for english... ciao ciao!!

I know the thompsonii like cool temps, very bright light but not direct sun, and moist (not soggy wet though) soil.
The others I can't help with.

Thanks mairzy and lalla!

Kelly

Hoya diptera is a pretty care free plant to grow so I am sure you won't have trouble with it.
Hoya buotii grows super fast but it likes to be moist so keep an eye on it. I have my plant in bright light close to a South window and it does very well there.
Hoya thompsonii has been slow for me. It likes to be moist but with those thick succulent leaves drying out does not bother it either.
Hoya chingungensis can be treated like Hoya lanceolata bella. You should find this one easy as you do very well with your bella.

Mike

Thanks Mike! (as always :)