Perhaps you should try some spelling variations:
yong zhang » yong phang, kong hang, yan zhang
jeong yeon » jeong hyeok, jeang yean, seung yeon
wang yong » wang yang, wang hyoung, wang yan
flow past » float past, flow cost, flow path
zhang si » zhang i, zhang ii, zhang li
si testi » i testi, ai test, i test
law past » law part, law east, law pt

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: wang yong zhang si testi ((new model) OR (((law past) OR (flow past)))) jeong yeon ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yong zhang si testi ((new model) or (((law past) OR (flow past)))) jeong yeon ;~".
• Adding a wildcard symbol may retrieve word variants: wang yong zhang si testi ((new model) or (((law past) OR (flow past)))) jeong yeon ;*.