Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc quy so snippets" » "duc duy so snippets", "duc huy so snippets", "duy quy so snippets", "duc quy mo snippets", "duc quyen so 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: (((("duc quy so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc quy so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc quy so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc quy so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.