Perhaps you should try some spelling variations:
mark david » mare davide, parker david
bank ravi » bank rate, bank api, bank bali
young ghi » young choi, hong ghi, young get
lang tan » liang tan, lang lang, tang tang
tan yang » dan yang, tan ying, tan yong
l1 gene » 1 gene, a1 gene, lof gene
11 gene » 1 gene, a1 gene, 11 gender

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 yang ((l1 gene) OR (11 gene)) ((bank ravi) OR (mark david)) young ghi ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang tan yang ((l1 gene) OR (11 gene)) ((bank ravi) or (mark david)) young ghi ;~".
• Adding a wildcard symbol may retrieve word variants: lang tan yang ((l1 gene) OR (11 gene)) ((bank ravi) or (mark david)) young ghi ;*.