Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong che vo snippets" » "dong che vo snippets", "dung che vo snippets", "luong che vo snippets", "duong che do snippets", "duong che va snippets", "duong che ho 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 che vo 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 che vo snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong che vo snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong che vo snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.