Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doc dao cong snippets" » "doc dao cuong snippets", "doc cao cong snippets", "doc dao dong snippets", "toc dao cong snippets", "duc dao cong snippets", "hoc 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 dao 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 dao cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc dao cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc dao cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.