Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ten hieu cac snippets" » "tin hieu cac snippets", "den hieu cac snippets", "thien hieu cac snippets", "ten hieu luc snippets", "ten hieu va snippets", "ten hieu van 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: (((("ten hieu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ten hieu cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ten hieu cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ten hieu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.