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