Perhaps you should try some spelling variations:
david young » david loundy
mark david » mare davide, parker david
liang tan » liang dan, wing tan
liang sun » liang dan, wing sun
young ghi » young choi, hong ghi, young get
li gene » i gene, iii gene, lof gene
l1 gene » 1 gene, 11 gene, a1 gene

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: ((liang tan) OR (liang sun)) yang ((li gene) OR (l1 gene)) mark david young ghi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((liang tan) or (liang sun)) yang ((li gene) OR (l1 gene)) mark david young ghi ;~".
• Adding a wildcard symbol may retrieve word variants: ((liang tan) or (liang sun)) yang ((li gene) OR (l1 gene)) mark david young ghi ;*.