Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong san du snippets" » "cong san code snippets", "cong tac du snippets", "cong san diu snippets", "cong van du snippets", "cong han du 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 san du 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 san du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong san du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong san du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.