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