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