Perhaps you should try some spelling variations:
"d nhanh cong snippets" » "d nhanh chong snippets", "d thanh cong snippets", "d nganh cong snippets", "day nhanh cong snippets", "doc nhanh cong snippets", "duy nhanh cong snippets"
"python using java snippets" » "python using data 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: (((("d nhanh cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("d nhanh cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( d nhanh cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("d nhanh cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.