Perhaps you should try some spelling variations:
dong hoang » hong hong
wang yang » wang yan, wang yanling
gene yang » gene bank
hua gene » human gene, a gene, hua ren
yang kim » yong kim, kang kim, hyung kim
kim song » kim young, kim eung
song seo » hong seo, song so, song seng

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong hoang) or (((wang liang) OR (wang yang)))) ya hua gene yang kim song seo ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (((wang liang) OR (wang yang)))) ya hua gene yang kim song seo ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong hoang) or (((wang liang) OR (wang yang)))) ya hua gene yang kim song seo ;*".