Perhaps you should try some spelling variations:
dong hoang » hong hong
hua irene » hua ren
tong shui » tong hui, cong shu, gong hui
alan hua » alan h, alan a, tan hua
line pll » line call, line plot, line plus
yang jie » yang jin, yang jui, yang yi
yang xi » yang yi, yang jui

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

• If you are trying to use Boolean operators, they must be ALL CAPS: dong hoang alan hua irene ((line pll) OR (((((yang jie) OR (yang xi))) OR (yang di)))) tong shui ;~.
• Adding a wildcard symbol may retrieve word variants: dong hoang alan hua irene ((line pll) or (((((yang jie) or (yang xi))) or (yang di)))) tong shui ;*.