Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong danh le snippets" » "cuong danh le snippets", "cong dan le snippets", "cong thanh le snippets", "cong dinh le snippets", "cong manh le snippets", "cong anh le snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 danh le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong danh le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong danh le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong danh le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.