Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi long ve snippets" » "hoi long ve snippets", "khi long ve snippets", "khoi dong ve snippets", "khoi luong va snippets", "khoi duong ve 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: (((("khoi long 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: (((("khoi long ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi long ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi long ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.