Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tich than du snippets" » "tinh than du snippets", "tich toan du snippets", "tinh thanh du snippets", "tich than duc snippets", "tich han du 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: (((("tich than du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tich than du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tich than du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tich than du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.