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