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