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