Perhaps you should try some spelling variations:
yan guan » yan yuan, yang guang, yihan guan
gan guan » quan guan, fan guon, gui guan
a1 gene » 11 gene, l1 gene
can one » than one, can only
1 gene » 11 gene, l1 gene, _ gene
a gene » a genre, a gender, a gentle
w can » w chan, _ can, 3 can
wang » wing, wan, lang
sau » saur, sabu, saul

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: wang ((yan guan) OR (gan guan)) ((((1 gene) OR (a1 gene))) OR (a gene)) w can one sau ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan guan) or (gan guan)) ((((1 gene) OR (a1 gene))) or (a gene)) w can one sau ;~".
• Adding a wildcard symbol may retrieve word variants: wang ((yan guan) or (gan guan)) ((((1 gene) OR (a1 gene))) or (a gene)) w can one sau ;*.