Perhaps you should try some spelling variations:
urban cost » urban costs, urban core, urban case
iran cost » iran case, can cost, run cost
sharing a » sharing _
lang yan » wang yan, wang yang, zhang yan
yan yang » yang yang, yao yang, dan yang
wong yue » wang yue, hong yu
a wong » y wong

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan yang ((iran cost) OR (urban cost)) sharing a wong yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan yang ((iran cost) OR (urban cost)) sharing a wong yue ;*".