Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket tinh do snippets" » "ke tinh do snippets", "ket kinh do snippets", "kieu tinh do snippets", "ket trinh do snippets", "ket tinh doi snippets", "ket tinh da 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: (((("ket tinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ket tinh do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket tinh do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket tinh do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.