Perhaps you should try some spelling variations:
truong thanh » luong thanh, truong tran, tran thanh
yuhan chang » yuan chang, han chang, yuhuan huang
wang yuhan » wang luhang, wang yan, wang yidan
yang lin » yang jin, wang lin, yang liang
yang li » yang xi, yang yi, tang li
c main » 1 main, 3 main, 4 main
2 main » 1 main

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yuhan chang ((c main) OR (2 main)) ((((yang lin) or (yang li))) or (yang di)) truong thanh ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yuhan chang ((c main) OR (2 main)) ((((yang lin) OR (yang li))) OR (yang di)) truong thanh ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yuhan chang ((c main) OR (2 main)) ((((yang lin) or (yang li))) or (yang di)) truong thanh ;".
• Adding a wildcard symbol may retrieve word variants: wang yuhan chang ((c main) OR (2 main)) ((((yang lin) or (yang li))) or (yang di)) truong thanh ;*.