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