Perhaps you should try some spelling variations:
zhang yan » zhang fan, zhang jian, wang yan
dan china » han china, dan china's, tuan china
lang yan » wang yan, wang yang, yang yang
dan yang » daun yang, tan yang, wang yang
gang hai » dang hai, shang hai, eang hay
yang li » yang lin, yang di, yang xi
li gang » liu gang, ii gang, i gang

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: ((lang yan) OR (zhang yan)) ((dan china) OR (can china)) dan yang li gang hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang yan) OR (zhang yan)) ((dan china) or (can china)) dan yang li gang hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang yan) OR (zhang yan)) ((dan china) or (can china)) dan yang li gang hai ;*.