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