Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"from va toan snippets" » "from vat toan snippets", "from a toan snippets", "from oxa toan snippets", "from van toan snippets", "from bai toan snippets", "from tap 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: (((("from va 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: (((("from va toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( from va toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("from va toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.