Perhaps you should try some spelling variations:
human gene » human genome, human gender, human bone
lang yan » wang yan, wang yang, zhang yan
dong bin » dong sin, dong di, dann bin
hua gene » hua ren, hy5 gene
song shu » cong shu, song shin, tong shui
li song » li cong, li rong, kim song
a gene » a genre, a gender, a gentle
tan li » tang li, tian li, gan li

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 yan) OR (dong bin)) ya ((((hua gene) OR (a gene))) OR (human gene)) tan li song shu ;~.
• Adding a wildcard symbol may retrieve word variants: ((lang yan) or (dong bin)) ya ((((hua gene) or (a gene))) or (human gene)) tan li song shu ;*.