Perhaps you should try some spelling variations:
wang shiyong » wang hyoung
linh hoang » anh hoang
wang yang » wang yan, wang liang, wang yanling
test sang » test salt, test sat
sang linh » sang minh, song lina, wang lin
hoang sy » hoang vu
yi hua » li hua, yi hui, ying hua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yang) or (wang shiyong)) ((yi hua) or (ya hua)) test sang linh hoang sy ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (wang shiyong)) ((yi hua) OR (ya hua)) test sang linh hoang sy ;.
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang shiyong)) ((yi hua) or (ya hua)) test sang linh hoang sy ;*.