Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam hai toan snippets" » "nam bai toan snippets", "nam hai tan snippets", "nam hach toan snippets", "nam thai toan snippets", "nam ha toan snippets", "nam tai 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: (((("nam hai 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: (((("nam hai toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam hai toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam hai toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.