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