Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong su he snippets" » "dang su he snippets", "dong tu he snippets", "dong luc he snippets", "dong su ve snippets", "dong so he snippets", "dong su ha 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: (((("dong su he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong su he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong su he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong su he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.