Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tong van cac snippets" » "trong van cac snippets", "thong van cac snippets", "tang van cac snippets", "tong van hac snippets", "tong van cau snippets", "tong van bac 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: (((("tong van cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong van cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tong van cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong van cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.