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