Perhaps you should try some spelling variations:
wang yidan » wang yan
being lait » being left, being fair, being fit
test using » tests using, tested using, testing using
using bank » housing bank
wang bian » wang ban, wang liang, wang yan
lait test » fit test, lait et, unit test
bond sara » bond data
bond sale » bond sales, bond rate

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang bian) OR (wang yidan)) being lait test using bank ((bond sara) or (bond sale)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang bian) OR (wang yidan)) being lait test using bank ((bond sara) OR (bond sale)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang bian) OR (wang yidan)) being lait test using bank ((bond sara) or (bond sale)) ;*".