Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan cua so snippets" » "nhat cua so snippets", "nhan luc so snippets", "nhan su so snippets", "nhan cua sro snippets", "nhan cua bo snippets", "nhan cua su 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 so 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 so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan cua so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan cua so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.