Perhaps you should try some spelling variations:
using tax » using a
than hong » tan hong, thang long, than one
using ya » using a, using _, using 4d
hua gene » human gene, a gene, hua ren
gene yan » gene bank, ren yan, see yan
yan than » van thanh, yan zhang, yan clan
hong shu » cong shu, tong shui, wong shiu

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

• Performing a fuzzy search may retrieve terms with similar spellings: done ((using ya) OR (using tax)) hua gene yan than hong shu ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "done ((using ya) OR (using tax)) hua gene yan than hong shu ;*".