Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket chon cac snippets" » "ket hop cac snippets", "ket hoa cac snippets", "het cho cac snippets", "ket cho cac snippets", "ket thong cac snippets", "ket hoc cac 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 chon cac 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 chon cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket chon cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket chon cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.