Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vu minh don snippets" » "vu minh doan snippets", "vu minh dong snippets", "vu minh son snippets", "vu dinh don snippets", "van minh don 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: (((("vu minh don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vu minh don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vu minh don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vu minh don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.