Perhaps you should try some spelling variations:
jeong dahyeon » jeong hyeok
cost sharing » risk sharing, cost savings
rent sharing » risk sharing, rent seeking
minh jeong » min jeong, minh cong
wang yang » wang yan, wang liang, wang yanling
yang yang » wang yan
yang hai » dang hai, yang hui, shang hai

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 yang yang hai ((rent sang) OR (((rent sharing) OR (cost sharing)))) minh jeong dahyeon ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang yang hai ((rent sang) or (((rent sharing) OR (cost sharing)))) minh jeong dahyeon ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang yang hai ((rent sang) or (((rent sharing) OR (cost sharing)))) minh jeong dahyeon ;*.