Perhaps you should try some spelling variations:
how slower » has slower, low lower
song ming » song bing, song min, jong min
wing yan » wang yan, wing ian, wing tan
yan gang » yan wang, yang guang, yang yang
der rede » der redner, der re
gong min » jong min, song min, gong meng
how slow » how low, grow slow, too slow

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: wing yan gang der rede ((song ming) OR (gong min)) ((how slow) OR (how slower)) ;~.
• Adding a wildcard symbol may retrieve word variants: wing yan gang der rede ((song ming) or (gong min)) ((how slow) or (how slower)) ;*.