Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu dan song snippets" » "ngu dan dong snippets", "ngu dan ong snippets", "ngu can song snippets", "ngu danh song snippets", "ngu van song snippets", "nguoi dan song 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: (((("ngu dan song snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu dan song snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu dan song snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu dan song snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.