Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phan viet da snippets" » "phan viet code snippets", "phap viet da snippets", "han viet da snippets", "pham viet da snippets", "phan viet dao snippets", "phan viet dat snippets", "phan viet ha 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 viet da 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 viet da snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( phan viet da snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan viet da snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.