Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hai le toan snippets" » "hai ke toan snippets", "hai le doan snippets", "hai le tuan snippets", "hai ly toan snippets", "tai le toan snippets", "hoi le 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: (((("hai le 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: (((("hai le toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hai le toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hai le toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.