Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong dan du snippets" » "cong dan code snippets", "cong san du snippets", "cong tan du snippets", "huong dan du snippets", "cong dan dau snippets", "cong danh du snippets", "cong dan su 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: (((("cong dan du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong dan du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong dan du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dan du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.