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