Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra cau den snippets" » "tra sau den snippets", "ta cau den snippets", "tra cuu den snippets", "tra cap den snippets", "tra cau de snippets", "tra hau 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: (((("tra cau 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: (((("tra cau den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra cau den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra cau den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.