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