Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet tay cac snippets" » "viet ta cac snippets", "viet nam cac snippets", "viet ha cac snippets", "viet tai cac snippets", "viet tay bac snippets", "viet tap cac 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 tay cac 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 tay cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet tay cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet tay cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.