Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao hop toan snippets" » "cao hop hoan snippets", "cao phap toan snippets", "cao tap toan snippets", "cac hop toan snippets", "cao hoc toan snippets", "cao hon 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: (((("cao hop 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: (((("cao hop toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao hop toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao hop toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.