Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan thi den snippets" » "pham thi den snippets", "tran thi den snippets", "phan tu den snippets", "phan thai den snippets", "phan thi dan snippets", "phan thi dep 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 thi den 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 thi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan thi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan thi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.