Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"long van nga snippets" » "luong van nga snippets", "song van nga snippets", "lang van nga snippets", "long van nghe snippets", "long van ngoc snippets", "long van nhan snippets", "long van nga slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("long van nga snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("long van nga snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( long van nga snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("long van nga snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.