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