Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan ky toan snippets" » "tan ke toan snippets", "tan ly toan snippets", "tan huy toan snippets", "than ky toan snippets", "tang ky toan snippets", "toan ky toan 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: (((("tan ky toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan ky toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan ky toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan ky toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.