Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dan tu hoi snippets" » "dan tu code snippets", "danh tu hoi snippets", "dan su hoi snippets", "ban tu hoi snippets", "dan thu hoi snippets", "dan tu choi snippets", "dan tu hoai snippets"
"python using java snippets" » "python using data 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: (((("dan tu hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan tu hoi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dan tu hoi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan tu hoi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.