Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra danh o snippets" » "tran danh o snippets", "trai doanh o snippets", "tran manh o snippets", "tra danh co snippets", "tra dinh o snippets", "tra danh cho 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: (((("tra danh o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra danh o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra danh o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra danh o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.