Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan vot con snippets" » "nhan vat con snippets", "nhan dot con snippets", "nhan vo con snippets", "nhan mot con snippets", "nhan vit con 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: (((("nhan vot 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: (((("nhan vot con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan vot con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan vot con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.