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