Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong ky he snippets" » "hong ky he snippets", "duong co he snippets", "duong va he snippets", "duong ke he snippets", "duong ly he snippets", "duong ky 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 ky he 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 ky he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong ky he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong ky he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.