Perhaps you should try some spelling variations:
wang liang » wang yang
liang than » liang tan, liang thow, liang dan
than oil » than coal, than only, than one
oil coal » oil cost, oil oil, oil can
plan als » celan als, plan a
plan act » plan east, plan a, can act
plan des » plan de, bilan des, plan du
wong yue » wang yue, hong yu

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang liang than oil coal ((((plan als) or (plan act))) or (plan des)) ((dang hai) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang liang than oil coal ((((plan als) OR (plan act))) OR (plan des)) ((dang hai) OR (wong yue)) ;.
• Adding a wildcard symbol may retrieve word variants: wang liang than oil coal ((((plan als) or (plan act))) or (plan des)) ((dang hai) or (wong yue)) ;*.