Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ke toi cong snippets" » "ke tai cong snippets", "ke thi cong snippets", "ke noi cong snippets", "ke doi cong snippets", "ke ton cong 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: (((("ke toi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ke toi cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ke toi cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ke toi cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.