Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao cong he snippets" » "cac cong he snippets", "cao dang he snippets", "cua cong he snippets", "cao cong che snippets", "cao cong ha snippets", "cao cong de 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: (((("cao cong he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao cong he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao cong he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao cong he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.