Perhaps you should try some spelling variations:
thinking firm » thinking form, thinking from, thinking circa
can thinking » lean thinking, case thinking, a thinking
yan liang » yang liang, wang liang, you liang
song skin » song shin, song jin
liang li » ling li, qiang li, liang wei
kann ein » kann eine, kann die, kann man
song min » song ming, gong min, jong min
wai yan » wang yan, wei yang

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: wai yan liang li can thinking firm ((kann ein) OR (((song skin) OR (song min)))) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wai yan liang li can thinking firm ((kann ein) or (((song skin) OR (song min)))) ;~".
• Adding a wildcard symbol may retrieve word variants: wai yan liang li can thinking firm ((kann ein) or (((song skin) OR (song min)))) ;*.