Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket hoang le snippets" » "kiem hoang le snippets", "viet hoang le snippets", "le hoang le snippets", "ket hoang de snippets", "ket hong le snippets", "ket hoang lam 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: (((("ket hoang le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ket hoang le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket hoang le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket hoang le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.