Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong cach le snippets" » "cong cac le snippets", "cong sach le snippets", "dong cach le snippets", "cong cach de snippets", "cong cach ben 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 cach 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 cach le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong cach le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong cach le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.