Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hon duc toan snippets" » "hon duc tan snippets", "hon duc ton snippets", "hon duc hoan snippets", "hong duc toan snippets", "ton duc toan snippets", "ho duc 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: (((("hon duc 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: (((("hon duc toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hon duc toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hon duc toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.