Perhaps you should try some spelling variations:
wang liang » wang yang
siong long » qing long
using long » using congo, using low, going long
yan liang » yang liang, you liang, yan wang
gene boon » gene pool
l1 gene » 1 gene, 11 gene, a1 gene
dan l1 » dan la, dan l

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yan liang) or (wang liang)) dan l1 gene boon ((siong long) OR (using long)) arm ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yan liang) OR (wang liang)) dan l1 gene boon ((siong long) OR (using long)) arm ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yan liang) or (wang liang)) dan l1 gene boon ((siong long) OR (using long)) arm ;*".