Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"muc canh cua snippets" » "luc canh cua snippets", "suc canh cua snippets", "luoc canh cua snippets", "muc manh cua snippets", "muc hanh cua snippets", "muc anh 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: (((("muc canh 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: (((("muc canh cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( muc canh cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("muc canh cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.