Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"mon viet da snippets" » "man viet da snippets", "mo viet da snippets", "muong viet da snippets", "mon viet dao snippets", "mon viet dat snippets", "mon viet ha 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: (((("mon viet 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: (((("mon viet da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( mon viet da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("mon viet da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.