Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
iran cost » urban cost, iran case, can cost
sharing a » sharing _
yan yang » yang yang, yao yang, dan yang
run cost » can cost, run cash, run out
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: zhang yan yang ((run cost) OR (iran cost)) sharing a wong yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "zhang yan yang ((run cost) OR (iran cost)) sharing a wong yue ;*".