Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung vat de snippets" » "dung vat code snippets", "dung va de snippets", "dong vat de snippets", "dung dat de snippets", "dung vat da snippets", "dung vat dien snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing 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: (((("dung vat de snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung vat de snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung vat de snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung vat de snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.