hey. i like 不思議遊戲, too.
You can find it in Youtube.
First you can search by typing the english name of the cartoon {fushigi yuugi}.
You can also go there and find these 3 users: ZigZagVampy, gretchenne, kaye0025. After that, you can find all the videos from the user.
There are 52 episodes in total.
Episodes contained in these 3 accounts:
ZigZagVampy (episodes 1-52)
gretchenne (episodes 17-52)
kaye0025 (episodes 1-5)
And there are 4 episodes in its OVA 永光傳.
Name of the account:FunYum2032
You can also search by typing
http://www.youtube.com/results?search_query=fushigi+yuugi+ova&search=Search (This will be easier to find the OVA.)
However, the cartoon may not be shown in cantonese. So, I hope you will not mind.
You may download 不思議遊戲 from cartoon bar:
http://www.kt8.com.cn/down/view_4499.html
http://www.kt8.com.cn/down/view_4492.html (OVA 永光傳, 4 episodes)