Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet bac can snippets" » "viet bao can snippets", "vien bach can snippets", "viet sach can snippets", "viet ban can snippets", "viet bat can snippets", "viet tac can 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: (((("viet bac can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("viet bac can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet bac can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet bac can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.