Perhaps you should try some spelling variations:
jeong hyeok » jeong dahyeon
kang minah » sang minh
jeong yeon » jeang yean, seung yeon, jeong dahyeon
dong yuan » don juan, dong hua, dong nan
gene kang » gene bank
citing a » citing _, writing a, exiting a
ting a » ting _, rating a

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

• Performing a fuzzy search may retrieve terms with similar spellings: dong yuan ((ting a) or (citing a)) gene kang minah ((jeong yeon) OR (jeong hyeok)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: dong yuan ((ting a) OR (citing a)) gene kang minah ((jeong yeon) OR (jeong hyeok)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "dong yuan ((ting a) or (citing a)) gene kang minah ((jeong yeon) OR (jeong hyeok)) ;*".