Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan cua di snippets" » "nhat cua di snippets", "nhan luc di snippets", "nhan su di snippets", "nhan cua dai snippets", "nhan cua dia snippets", "nhan cua vi 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: (((("nhan cua di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan cua di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan cua di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan cua di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.