Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong cuc da snippets" » "dong luc da snippets", "dong cua da snippets", "tong cuc da snippets", "dong cuc du snippets", "dong cuu da snippets", "dong cuc do 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 cuc da 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 cuc da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cuc da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cuc da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.