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