Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tat duy doc snippets" » "ta duy doc snippets", "tran duy doc snippets", "tat day doc snippets", "tat duy dac snippets", "tat duy 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: (((("tat duy doc 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 duy doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tat duy doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tat duy doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.