Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong viet cd snippets" » "cong viet cd snippets", "dung viet cd snippets", "dang viet cd snippets", "dong viet co snippets", "dong viet ca snippets", "dong viet cho 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: (((("dong viet cd snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong viet cd snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong viet cd snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong viet cd snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.