Perhaps you should try some spelling variations:
changes kim » changes big, changes did, changes git
yang lanka » yang anda
4.1 direct » 2.1 direct
wang yang » wang yan, wang liang, wang yanling
4 direct » _ direct, a direct, 5 direct
kim song » kim young, kim eung
song so » song von

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 lanka ((4.1 direct) OR (4 direct)) changes kim song so ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang lanka ((4.1 direct) OR (4 direct)) changes kim song so ;".
• Adding a wildcard symbol may retrieve word variants: wang yang lanka ((4.1 direct) OR (4 direct)) changes kim song so ;*.