Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet hang ca snippets" » "viet hoang ca snippets", "viet hung ca snippets", "viet nang ca snippets", "viet hang va snippets", "viet nang cao snippets", "viet hang tai 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 hang ca 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 hang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet hang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet hang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.