Perhaps you should try some spelling variations:
mark david » mare davide, parker david
liang tan » liang dan, liang sun, wing tan
bank ravi » bank rate, bank api, bank bali
young ghi » young choi, hong ghi, young get
lang tan » lang lang, tang tang, hong tan
yang l1 » yang li, yang all, yang lin
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: ((lang tan) OR (liang tan)) yang l1 gene ((bank ravi) OR (mark david)) young ghi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang tan) OR (liang tan)) yang l1 gene ((bank ravi) or (mark david)) young ghi ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang tan) OR (liang tan)) yang l1 gene ((bank ravi) or (mark david)) young ghi ;*.