Perhaps you should try some spelling variations:
among american » among mexican, aging american
hua gene » human gene, a gene, hy5 gene
yang lin » yang jin, wang lin, yang li
yang jie » yang jin, yang di, yang jui
meng shu » cong shu
hua ren » hua chen
dong » doing, long, done

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong sin) OR (among american)) ya ((hua gene) OR (hua ren)) ((yang lin) OR (yang jie)) meng shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong sin) OR (among american)) ya ((hua gene) OR (hua ren)) ((yang lin) OR (yang jie)) meng shu ;".
• Adding a wildcard symbol may retrieve word variants: ((dong sin) OR (among american)) ya ((hua gene) OR (hua ren)) ((yang lin) OR (yang jie)) meng shu ;*.