Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dai tu doan snippets" » "dai du doan snippets", "dai tu dan snippets", "dai tap doan snippets", "dai thu doan snippets", "tai tu doan snippets", "mai tu doan 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 doan 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 doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dai tu doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dai tu doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.