Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ham toan chi snippets" » "tam toan chi snippets", "hach toan chi snippets", "nham hoan chi snippets", "ham toan cao snippets", "ham tai chi snippets", "ham luan chi 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: (((("ham toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ham toan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ham toan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ham toan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.