Perhaps you should try some spelling variations:
seeing knowing » seeing looking
knowing about » known about, know about, knowing your
yang seeing » yang keming, change seeing
dong hoang » hong hong
wang liang » wang yang
chen yang » chen rong
hui chen » jui chen, hua chen, yi chen
yi hui » li hui

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong hoang) or (wang liang)) yi hui chen yang seeing knowing about ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong hoang) OR (wang liang)) yi hui chen yang seeing knowing about ;.
• Adding a wildcard symbol may retrieve word variants: ((dong hoang) or (wang liang)) yi hui chen yang seeing knowing about ;*.