Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet chu cau snippets" » "viet chau cau snippets", "viet cho cau snippets", "viet cau cau snippets", "viet chua cau snippets", "viet nhu cau snippets", "viet chu cai 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 chu cau 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 chu cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet chu cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet chu cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.