Perhaps you should try some spelling variations:
real liang » real long, real line
wang wang » wang yang, wang liang, wang yan
oman oil » oman till, can oil, ogn oil
liang li » ling li, qiang li, liang wei
hong hai » shang hai, zhong tai, dang hai
ban oil » can oil, than oil
hong yu » wong yue

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) OR (oman oil)) real liang li ((hong hai) or (hong yu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang wang ((ban oil) OR (oman oil)) real liang li ((hong hai) OR (hong yu)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang wang ((ban oil) OR (oman oil)) real liang li ((hong hai) or (hong yu)) ;".
• Adding a wildcard symbol may retrieve word variants: wang wang ((ban oil) OR (oman oil)) real liang li ((hong hai) or (hong yu)) ;*.