Perhaps you should try some spelling variations:
bias wann » bias when
test how » west how, tested how, trust how
dong bin » dong sin, dong di, dann bin
how bias » home bias, how big, how bad
wann war » dann war, wann der, wann hat
yuk a » yu a
uk a » up a, uk _
y la » a la, _ la
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yan) or (dong bin)) ((((yuk a) or (uk a))) or (((y a) OR (y la)))) test how bias wann war ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yan) OR (dong bin)) ((((yuk a) OR (uk a))) OR (((y a) OR (y la)))) test how bias wann war ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yan) or (dong bin)) ((((yuk a) or (uk a))) or (((y a) OR (y la)))) test how bias wann war ;*".