Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ung xu cao snippets" » "ung cu cao snippets", "ung vu cao snippets", "ung su cao snippets", "dung xu cao snippets", "cung xu cao 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: (((("ung xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ung xu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ung xu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ung xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.