Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong thu le snippets" » "duong thuy le snippets", "duong thi le snippets", "luong thuc le snippets", "duong thu les snippets", "duong thu xe snippets", "duong tu le 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: (((("duong thu 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: (((("duong thu le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong thu le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong thu le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.