Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuc van cau snippets" » "duc van cau snippets", "luc van cau snippets", "xuc ban cau snippets", "xuc van dau snippets", "xuc van hau snippets", "xuc van chat 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: (((("xuc van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuc van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuc van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuc van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.