Can anyone teach me how to make the ads appear in this page again? Should i add more english content or should i add more focus keyword? What should i do? http://www.kahsoon.com/2005/10/19/jay-chou-ye-qu-lyric-周杰伦夜曲歌词/
If google doesn't has any advertisement to show of for the content of your page, it shows the PSA ads. Use the default feature of adsense.
a great way to show adsense on that page is to apply the two technique you already had mentioned. 1. Add more content 2. focus into the keywords