Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ket vang cua snippets" » "ket van cua snippets", "ket va cua snippets", "ket mang cua snippets", "ket hang cua snippets", "ket tang cua 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 vang cua 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 vang cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ket vang cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ket vang cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.