Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tao dieu con snippets" » "cao dieu con snippets", "vao dieu con snippets", "than dieu con snippets", "tao dieu can snippets", "tao diet con snippets", "tao dieu co 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: (((("tao dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tao dieu con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tao dieu con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tao dieu con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.