Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong nhan vo snippets" » "cong nhat vo snippets", "cong thanh vo snippets", "cong san vo snippets", "cong nhan va snippets", "cong nhan mo snippets", "cong than vo 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: (((("cong nhan 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: (((("cong nhan vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong nhan vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong nhan vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.