Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao van lee snippets" » "cac van lee snippets", "dao van lee snippets", "cao dang lee snippets", "cao van le snippets", "cao han lee snippets", "cao tan lee 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 van lee 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 van lee snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao van lee snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao van lee snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.