Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngac van cau snippets" » "ngan van cau snippets", "ngai van cau snippets", "ngo van cau snippets", "ngac van dau snippets", "ngac van hau snippets", "ngac 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: (((("ngac 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: (((("ngac van cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngac van cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngac van cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.