Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet hat ca snippets" » "viet nhat ca snippets", "viet ha ca snippets", "viet dat ca snippets", "viet hat cua snippets", "viet tat ca snippets", "viet hat va 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 hat 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 hat ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet hat ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet hat ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.