Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pha phan cac snippets" » "phap phan cac snippets", "phan phan cac snippets", "phe phan cac snippets", "pha nhan cach snippets", "pha phan dau snippets", "pha phan lap 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 phan cac 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 phan cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pha phan cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha phan cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.