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