Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra quan den snippets" » "tri quan den snippets", "tran quang den snippets", "toan quan den snippets", "tra quan doan snippets", "tra quan he snippets", "tra quan doi 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 quan 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 quan den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra quan den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra quan den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.