Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat gia do snippets" » "dau gia do snippets", "danh gia do snippets", "dat gia dao snippets", "dat gia doi snippets", "dat giac 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: (((("dat gia do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dat gia do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat gia do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat gia do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.