Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong vang te snippets" » "cong lang te snippets", "cong quang te snippets", "cong ngang te snippets", "cong van te snippets", "cong vang de snippets", "cong vang ve 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: (((("cong vang te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong vang te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong vang te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong vang te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.