Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat tuong vo snippets" » "dai tuong vo snippets", "dat trong vo snippets", "dau tuong vo snippets", "dat tuong ho snippets", "dat cuong vo snippets", "dat tuong so 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 tuong vo 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 tuong vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat tuong vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat tuong vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.