Perhaps you should try some spelling variations:
yuan cheng » yuan chang, huang cheng, yu cheng
qian wang » yiqian wang, qian rong, qian yan
zhong tai » hong tan, zhong zhi
yan wang » yuan wang, yang yang, yan liang
hong hai » shang hai, dang hai, hong tan
ning li » ling li, liang li, qiang li
sar » sara, star, saur

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yuan cheng) or (((yan wang) or (qian wang)))) ning li eng ((hong hai) OR (zhong tai)) kong sar ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yuan cheng) OR (((yan wang) OR (qian wang)))) ning li eng ((hong hai) OR (zhong tai)) kong sar ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yuan cheng) or (((yan wang) or (qian wang)))) ning li eng ((hong hai) OR (zhong tai)) kong sar ;*".