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