Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"viet hanh ve snippets" » "viet thanh ve snippets", "viet anh ve snippets", "viet han ve snippets", "viet hanh vi snippets", "viet hanh va snippets", "viet hanh kem 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 hanh ve 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 hanh ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( viet hanh ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("viet hanh ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.