For Shuang Tian Zhi Zhun, opening song is 'chen mo de gao yang'
by zhao chuan. ending song is 'ai yao zen me shuo chu kou' also by
zhao chuan.
Serial of Fann Wong i think you are refering to 'Xin Ah Lang'? the
theme song is 'bie rang qing liang nan' by Fann Wong and Jeff
Chang.
Clue: above songs not very hard to find. 
if you
really want to buy, you can go dig the old CDs at cash convertors.
songs may or may not be together in an album.
