Perhaps you should try some spelling variations:
wang wang » wang yang, wang liang, wang yan
wang ban » wang yan, wang dan, wang yang
oil coal » oil cost, oil can, oil chad
plant li » plant life, plant lice, plant oil
hong hai » shang hai, zhong tai, dang hai
wong yue » hong yu
wang yue » wang hua, wang yan, wang he
oil oil » coal oil

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang wang ban ((oil coal) OR (oil oil)) plant li ((hong hai) or (((wong yue) or (wang yue)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang wang ban ((oil coal) OR (oil oil)) plant li ((hong hai) OR (((wong yue) OR (wang yue)))) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang ban ((oil coal) OR (oil oil)) plant li ((hong hai) or (((wong yue) or (wang yue)))) ;".
• Adding a wildcard symbol may retrieve word variants: wang wang ban ((oil coal) OR (oil oil)) plant li ((hong hai) or (((wong yue) or (wang yue)))) ;*.