Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phan duc chi snippets" » "phan duc code snippets", "pham duc chi snippets", "phan tu chi snippets", "phan dau chi snippets", "phan du chi snippets", "phan duc thi snippets", "phan duc chien 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 duc chi 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 duc chi snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( phan duc chi snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan duc chi snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.