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