Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi con toan snippets" » "chi cong toan snippets", "chi mon toan snippets", "chi con than snippets", "cho con toan snippets", "khi con 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: (((("chi con 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: (((("chi con toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi con toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi con toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.