Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong chi den snippets" » "cong khi den snippets", "cong cho den snippets", "con chi den snippets", "cong chi ben snippets", "cong chi dan snippets", "cong nhi den 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: (((("cong chi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong chi den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong chi den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong chi den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.