Perhaps you should try some spelling variations:
dong cao » dong xiao, dan cao, dong nan
gene yan » gene bank, ren yan, see yan
long shu » cong shu, tong shui, long du
eu long » au long
a gene » a genre, a gender, a gentle
yan eu » can eu
ya a » a a, y a, ye a
sin » sign, sind, skin

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong cao) or (dong sin)) ya a gene yan eu long shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong cao) OR (dong sin)) ya a gene yan eu long shu ;.
• Adding a wildcard symbol may retrieve word variants: ((dong cao) or (dong sin)) ya a gene yan eu long shu ;*.