Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"ngu danh cac snippets" » "ngu danh code snippets", "ngu anh cac snippets", "ngu dan cac snippets", "ngan danh cac snippets", "ngu dinh cac snippets", "ngu danh ca snippets", "ngu hanh cac 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: (((("ngu danh cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu danh cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( ngu danh cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu danh cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.