Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong va du snippets" » "dung va du snippets", "dong ha du snippets", "luong va du snippets", "dong va dau snippets", "dong va su snippets", "dong va tu 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 va du 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 va du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong va du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong va du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.