Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phan dan den snippets" » "phan dan code snippets", "phan dang den snippets", "phan dau den snippets", "nhan dan den snippets", "phan ban den snippets", "phan van den snippets", "phan dan dung 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: (((("phan dan den snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan dan den snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( phan dan den snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan dan den snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.