Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet tri da snippets" » "viet tai da snippets", "viet trinh da snippets", "viet tran da snippets", "viet tri dac snippets", "viet tri dai snippets", "viet tri dau 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 tri da 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 tri da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet tri da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet tri da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.