Perhaps you should try some spelling variations:
chuan gene » human gene
yuan ting » yuan ming, huang ting, yuan kang
shang hai » shang kai, dang hai, chang ha
hoang sy » hoang vu
hoang ka » hoang vu, hoang _, hoang h
hong hai » zhong tai, dang hai, hong tan
jing ji » ying jin

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong ((hoang ka) or (hoang sy)) chuan gene ((yuan ting) or (jing ji)) ((hong hai) OR (shang hai)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong ((hoang ka) OR (hoang sy)) chuan gene ((yuan ting) OR (jing ji)) ((hong hai) OR (shang hai)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong ((hoang ka) or (hoang sy)) chuan gene ((yuan ting) or (jing ji)) ((hong hai) OR (shang hai)) ;".
• Adding a wildcard symbol may retrieve word variants: dong ((hoang ka) or (hoang sy)) chuan gene ((yuan ting) or (jing ji)) ((hong hai) OR (shang hai)) ;*.