Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"den trao doi snippets" » "den tran doi snippets", "dien trac doi snippets", "dien trai doi snippets", "den tao doi snippets", "den trao khoi snippets", "den truan doi 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: (((("den trao doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("den trao doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( den trao doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("den trao doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.