Perhaps you should try some spelling variations:
shang hai » shang kai, dang hai, chang ha
coal lang » coal plant
oil coal » oil cost, oil oil, oil can
wong yue » wang yue, hong yu
yan can » yan clan, man can, yan cong
can oil » can soils, can only, corn oil
lang li » liang li, ling li, tang li
wang » wing

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: (wang OR wan) yan can oil coal lang li ((shang hai) OR (wong yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang OR wan) yan can oil coal lang li ((shang hai) or (wong yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wang OR wan) yan can oil coal lang li ((shang hai) or (wong yue)) ;*.