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