Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"goc cua toan snippets" » "goc cuu toan snippets", "goc xuan toan snippets", "goc cua thanh snippets", "hoc cua toan snippets", "doc cua toan snippets", "goc qua toan 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: (((("goc cua toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("goc cua toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( goc cua toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("goc cua toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.