Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong cua he snippets" » "cong cua code snippets", "cong cu he snippets", "dong cua he snippets", "huong cua he snippets", "cong cua che snippets", "cong cua te snippets", "cong cua 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 cua he 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 cua he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong cua he snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cua he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.