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