Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan quoc da snippets" » "han quoc da snippets", "tran quoc da snippets", "toan quoc da snippets", "phan quoc dan snippets", "phan quoc dat snippets", "phan quoc va 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 quoc da 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 quoc da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan quoc da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan quoc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.