Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"can cuong ve snippets" » "van cuong ve snippets", "tan cuong ve snippets", "cao cuong ve snippets", "can cuong vo snippets", "can duong ve snippets", "can luong va 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: (((("can cuong ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("can cuong ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( can cuong ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("can cuong ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.