Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac luat cua snippets" » "cap luat cua snippets", "cac xuat cua snippets", "cac thuat cua snippets", "cac luat sua snippets", "cac lua 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: (((("cac luat 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: (((("cac luat cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac luat cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac luat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.