Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vu minh dot snippets" » "vu minh mot snippets", "vu minh don snippets", "vu dinh doat snippets", "vu dinh dot snippets", "van minh dot 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 dot 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 dot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vu minh dot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vu minh dot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.