Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao khai son snippets" » "cao chat son snippets", "co khi son snippets", "cao tai son snippets", "cao thai son snippets", "cao hai son snippets", "cao khac son 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 khai son 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 khai son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao khai son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao khai son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.