Perhaps you should try some spelling variations:
dong sign » dong sin, among sign, dong bin
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang lin » yang jin, wang lin, yang li
lin long » lin ling, lin zong, pain long
long shu » cong shu, tong shui, long du
dong di » dong sin

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

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