Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"luan danh du snippets" » "luan danh code snippets", "luan thanh du snippets", "luan van du snippets", "luan nang du snippets", "luan danh dau snippets", "luan danh tu snippets", "luan dinh du 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: (((("luan danh 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: (((("luan danh du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( luan danh du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luan danh du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.