Perhaps you should try some spelling variations:
changes can » change can, changes than, changes a
3.4 detect » 3.4 defects, 3.4 select, 3.4 detection
3.4 direct » 3.2 direct, 3.1 direct, 3.3 direct
wang ryan » wang yang, wang ban, wang dan
can song » can hong, a song, can sort
song so » song von
ryan » ryang
yan » yang

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: ((wang ryan) OR (wang yan)) lankas ((3.4 detect) OR (3.4 direct)) changes can song so ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang ryan) or (wang yan)) lankas ((3.4 detect) OR (3.4 direct)) changes can song so ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang ryan) or (wang yan)) lankas ((3.4 detect) OR (3.4 direct)) changes can song so ;*.