Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet ly doi snippets" » "tiet ly doi snippets", "viet my doi snippets", "viet ty doi snippets", "viet ly dai snippets", "viet ky doi snippets", "viet ly do 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 ly doi 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 ly doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet ly doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet ly doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.