Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"coc manh cua snippets" » "suc manh cua snippets", "ho manh cua snippets", "chu manh cua snippets", "coc doanh cua snippets", "coc ban 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: (((("coc manh 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: (((("coc manh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( coc manh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("coc manh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.