Perhaps you should try some spelling variations:
doing von » doing un, ing von
when coal » when goal, women coal, when can
daten ii » daten iii, daten im, daten vi
coal min » coal mine, coal mines, coal oil
yang yun » yang jun, tang yun, yang yue
ii when » xxii when, ii where, ii wesen
yang xi » yang yi, yang jui

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

• Performing a fuzzy search may retrieve terms with similar spellings: doing von daten ii when coal min ((yang yun) or (((yang xi) or (yang di)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doing von daten ii when coal min ((yang yun) OR (((yang xi) OR (yang di)))) ;*.