Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet dao mon snippets" » "viet lao mon snippets", "viet bao mon snippets", "viet da mon snippets", "viet dap mon snippets", "viet dan mon snippets", "viet hao mon 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 dao mon 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 dao mon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet dao mon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet dao mon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.