Perhaps you should try some spelling variations:
wang kang » wang yang, wang liang, wang yong
thanh vu » thanh van, thanh _
tan ying » fan ying, tan yang, tan yong
ran ying » fan ying, jin ying, gao ying
han hua » tan hua, wang hua, tuan hua
li dang » le dang, li gang, li wang
hai » hadi, haji, hari

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang kang ((han hua) or (thanh vu)) ((wang yan) or (((tan ying) OR (ran ying)))) li dang hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang kang ((han hua) OR (thanh vu)) ((wang yan) OR (((tan ying) OR (ran ying)))) li dang hai ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang kang ((han hua) or (thanh vu)) ((wang yan) or (((tan ying) OR (ran ying)))) li dang hai ;".
• Adding a wildcard symbol may retrieve word variants: wang kang ((han hua) or (thanh vu)) ((wang yan) or (((tan ying) OR (ran ying)))) li dang hai ;*.