Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don nu doc snippets" » "don su doc snippets", "dong nhu doc snippets", "don n1 doc snippets", "don n2 doc snippets", "don n3 doc 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: (((("don nu doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don nu doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don nu doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don nu doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.