Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan vo cac snippets" » "nhan va cac snippets", "nhan mo cac snippets", "than vo cac snippets", "nhan voi cac snippets", "nhan o cac 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: (((("nhan vo cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan vo cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan vo cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan vo cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.