Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dung sai doc snippets" » "dung sai code snippets", "dung tai doc snippets", "dung va doc snippets", "dung dat doc snippets", "dung bai doc snippets", "dung mai duoc snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data 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: (((("dung sai doc snippets") or ("python using data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung sai doc snippets") OR ("python using data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung sai doc snippets ) or ( python using data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung sai doc snippets") or ("python using data snippets"))) or ("locating bug core snippets"))*.