Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che quoc lo snippets" » "che duoc lo snippets", "he quoc lo snippets", "che thuoc lo snippets", "che quoc co snippets", "che quoc o snippets", "che quoc so 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: (((("che quoc lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che quoc lo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che quoc lo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che quoc lo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.