Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc sieu don snippets" » "duoc sieu don snippets", "doc hieu don snippets", "hoc sieu don snippets", "doc sieu dan snippets", "doc kieu doan snippets", "doc sieu van 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: (((("doc sieu don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doc sieu don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc sieu don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc sieu don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.