Perhaps you should try some spelling variations:
wang yang » wang yan, wang liang, wang yanling
zhong tai » hong tan, zhong zhi
yang can » yang fan, yang dean, yang yang
oil real » oil coal, oil rent
line pll » line call, line plot, line plus
hong hai » shang hai, dang hai, hong tan
wong yue » wang yue, hong yu
can oil » can soils, can only, corn oil
line li » line hi, line log

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 yang can oil real ((line li) OR (line pll)) ((((zhong tai) OR (hong hai))) OR (wong yue)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang can oil real ((line li) OR (line pll)) ((((zhong tai) or (hong hai))) or (wong yue)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang can oil real ((line li) OR (line pll)) ((((zhong tai) or (hong hai))) or (wong yue)) ;*.