Perhaps you should try some spelling variations:
knowing about » known about, know about, knowing your
kong saur » kong sar, kong siu, kong your
lang yan » wang yan, wang yang, zhang yan
yan yang » yang yang, yao yang, dan yang
kong eiu » tonga eiu
using a » using _
i test » ai test, ii test, 2 test

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan yang ((i test) OR (i testi)) using a ((((kong saur) or (knowing about))) or (kong eiu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan yang ((i test) OR (i testi)) using a ((((kong saur) OR (knowing about))) OR (kong eiu)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan yang ((i test) OR (i testi)) using a ((((kong saur) or (knowing about))) or (kong eiu)) ;".
• Adding a wildcard symbol may retrieve word variants: lang yan yang ((i test) OR (i testi)) using a ((((kong saur) or (knowing about))) or (kong eiu)) ;*.