Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai tu chen snippets" » "dai tu che snippets", "dai tu chon snippets", "dai yu chen snippets", "dai thu chen snippets", "tai tu chen snippets", "mai tu chen 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: (((("dai tu chen snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dai tu chen snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai tu chen snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai tu chen snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.