Perhaps you should try some spelling variations:
dong sign » dong sin, among sign, dong bin
gene bank » gene banks, one bank, genomen bank
bank jin » bank aid, bank btn, bank can
jin ying » li ying
ying shu » ying zhu, cong shu, ying hua
wan yan » nan yan, wai yan, wang yang
dong di » dong sin
a gene » a genre, a gender, a gentle
ya a » a a, y a, ye a

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: ((((wan yan) OR (wang yan))) OR (((dong di) OR (dong sign)))) ya a gene bank jin ying shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((wan yan) OR (wang yan))) or (((dong di) or (dong sign)))) ya a gene bank jin ying shu ;~".
• Adding a wildcard symbol may retrieve word variants: ((((wan yan) OR (wang yan))) or (((dong di) or (dong sign)))) ya a gene bank jin ying shu ;*.