Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi tinh he snippets" » "chai tinh he snippets", "chi minh he snippets", "chi binh he snippets", "chi trinh he snippets", "chi tinh ha snippets", "chi tich he 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: (((("chi tinh 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: (((("chi tinh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi tinh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi tinh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.