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