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