Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan xuan co snippets" » "pham xuan co snippets", "phan quan co snippets", "phan xuat co snippets", "phan xuan ho snippets", "phan xuan can 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: (((("phan xuan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan xuan co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan xuan co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan xuan co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.