Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toc canh cua snippets" » "luoc canh cua snippets", "ngoc canh cua snippets", "luc canh cua snippets", "toc manh cua snippets", "toc hanh cua snippets", "toc anh cua 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: (((("toc canh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc canh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc canh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc canh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.