Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhu hai con snippets" » "thu hai con snippets", "nhu tai con snippets", "thu hoai con snippets", "nhu phai con snippets", "nhu bai con snippets", "nhu hai son 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: (((("nhu hai con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhu hai con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhu hai con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhu hai con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.