Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc hinh he snippets" » "duc thinh he snippets", "duc minh he snippets", "duc hanh he snippets", "duc hinh ha snippets", "duc tinh he snippets", "duc chinh che 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: (((("duc hinh 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: (((("duc hinh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc hinh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc hinh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.