Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao phan ke snippets" » "co phan ke snippets", "cho phan ke snippets", "cac phan ke snippets", "cao phan le snippets", "cao phan ve snippets", "cao phan ky 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 phan ke 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 phan ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao phan ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao phan ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.