Perhaps you should try some spelling variations:
knowing about » known about, know about
knowing your » growing your, know your, keeping your
thanh yan » thanh van, thanh dam
wei guang » wei shang, wei qiang, fei huang
yan guan » gan guan, yan yuan, yang guang
guan wei » hua wei, guan li, han wei

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

• Performing a fuzzy search may retrieve terms with similar spellings: (binh or minh) thanh yan guan wei guang king ((knowing your) OR (knowing about)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (binh OR minh) thanh yan guan wei guang king ((knowing your) OR (knowing about)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(binh or minh) thanh yan guan wei guang king ((knowing your) OR (knowing about)) ;*".