Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao hoat he snippets" » "co hoat he snippets", "cao chat he snippets", "dan hoat he snippets", "cao hoa he snippets", "cao hoat ho snippets", "cao thuat he 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 hoat he 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 hoat he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao hoat he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao hoat he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.