Perhaps you should try some spelling variations:
yang yang » wang yang, wang yan
yan wang » yuan wang, qian wang, yan liang
can lang » can laugh, can plant, lang lang
hong hai » shang hai, zhong tai, dang hai
wong yue » wang yue, hong yu
oil can » oil cake, oil chad, oil coal
lang li » liang li, ling li, tang li

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yan wang) or (yang yang)) oil can lang li ((hong hai) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan wang) OR (yang yang)) oil can lang li ((hong hai) OR (wong yue)) ;.
• Adding a wildcard symbol may retrieve word variants: wang ((yan wang) or (yang yang)) oil can lang li ((hong hai) or (wong yue)) ;*.