Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngoc van son snippets" » "ngo van son snippets", "ngoc lan son snippets", "ngoc tan son snippets", "ngoc van dong snippets", "ngoc van cong snippets", "ngoc van sung snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("ngoc van son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngoc van son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngoc van son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngoc van son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.