Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong van don snippets" » "cong van code snippets", "cong vang don snippets", "cong san don snippets", "song van don snippets", "cong van dong snippets", "cong van doan snippets", "cong van dan snippets"
"python using java snippets" » "python using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("cong van 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: (((("cong van don snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong van don snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong van don snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.