Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc quan de snippets" » "qua quan de snippets", "luc quan de snippets", "hoc quan de snippets", "quoc quan den snippets", "quoc quang de snippets", "quoc quan he 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: (((("quoc quan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quoc quan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc quan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc quan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.