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