Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac thoi cu snippets" » "cac toi cu snippets", "cac hop cu snippets", "cac tro cu snippets", "cac thi cu snippets", "cac hoi cu snippets", "cac thoi su 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: (((("cac thoi cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac thoi cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac thoi cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac thoi cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.