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