Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hieu van toc snippets" » "hieu van code snippets", "hieu va toc snippets", "thien van toc snippets", "lieu va toc snippets", "hieu van hoc snippets", "hieu dan toc snippets", "hieu van toi 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: (((("hieu van toc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu van toc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hieu van toc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu van toc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.