Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao quan chi snippets" » "co quan chi snippets", "bao quan chi snippets", "cao xuan chi snippets", "cao luan chi snippets", "cao quan che snippets", "cao quan chu 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 quan chi 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 quan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao quan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao quan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.