Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"san van hoan snippets" » "san van hoang snippets", "san van hoa snippets", "san van toan snippets", "tan van hoan snippets", "luan van hoan snippets", "tran van hoan 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: (((("san van hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("san van hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( san van hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("san van hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.