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