Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dang khai so snippets" » "dang khoi so snippets", "dang hai so snippets", "quang khai so snippets", "dang khai mo snippets", "dang khi so 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: (((("dang khai so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang khai so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang khai so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang khai so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.