Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket trong co snippets" » "ke trong co snippets", "viet trong co snippets", "dot trong co snippets", "ket trong ca snippets", "ket trong cong snippets", "ket trong cuoc 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 trong co 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 trong co snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket trong co snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket trong co snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.