Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
data thi » data third, data tsiv, data tax
thi wong » thi hong, thi mong, t.j wong
wong yue » wang yue, hong yu
3 test » f test, 4 test, 3.2 test
2 test » 3.2 test

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 yang) OR (((yang yang) OR (wang yanling)))) gang ((3 test) OR (2 test)) data thi wong yue ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong yang) or (((yang yang) or (wang yanling)))) gang ((3 test) OR (2 test)) data thi wong yue ;~".
• Adding a wildcard symbol may retrieve word variants: ((dong yang) or (((yang yang) or (wang yanling)))) gang ((3 test) OR (2 test)) data thi wong yue ;*.