Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi duong ve snippets" » "chi duong ve snippets", "phi thuong ve snippets", "thai duong ve snippets", "phi duong va snippets", "phi duong vien snippets", "phi duong van 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: (((("phi duong 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: (((("phi duong ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi duong ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi duong ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.