There’s really no difference between “bunny” and “rabbit”. People used to use the word “bunny” to refer to a baby or young rabbit, but these days, a lot of folks, especially us house-rabbit folks, use the terms interchangeably; in fact, a lot of us use the even shorter form “bun”.
I don’t know if you’ve already checked this source, but Pet Lovers Centre, petloverscentre.com.my appears to have timothy hay in stock via mail order:
http://www.petloverscentre.com.my/Forms/Products.aspx?DepartmentID=6&DeptCategoryID=89
Depending on where in Malaysia you are, there are quite a few locations in the Kuala Lumpur metro area if you have or can get transport to get there, timothy hay might not necessarily be in stock at a given store. I see they stock Oxbow, and have oat and orchard as well as timothy. @ThorBunny’s suggestion about feed stores supplying farmers is a good one too, and they may have cheaper prices on hay than pet stores. I’d also check with the local Humane Society or SPCA, or better yet a rabbit rescue organization if there’s one such in Malaysia. I recommend offering your bun an amount of hay at least equal to body size/volume twice daily, or more often if your bun has a big appetite
, and keep refreshed as needed.
The House Rabbit Society in the U.S. (www.rabbit.org) maintains a comprehensive list of which vegetables are best to feed rabbits; basically, you want dark-green, leafy veggies such as red and green leaf and romaine lettuce (NOT iceberg!) I don’t know if you have in Malaysia the salad mix known in the U.S. as “spring mix”, but if you do, it’s very good to feed rabbits since it contains a good mixture of the best leafy greens.
UPDATE: I see that your bunny is 6 months old, so yes, she should begin transitioning to unlimited grass hay and timothy-based pellets (I didn’t look, but I think you can get Oxbow timothy pellets at Pet Lovers Centre too – look for “Oxbow Essentials Adult Rabbit Food”; you should give your bun only 1/8 cup per 5 pounds adult body weight per day; these are U.S. measures, I’m not sure what the metric equivalent would be). Since your bun is an Angora, per @jerseygirl, I’d venture to say that you should offer grass hay of one of the suggested types mixed with a small amount of alfalfa hay daily to keep the fur coat in good condition.