Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tuan anh doc snippets" » "tuan anh code snippets", "tuan anh duc snippets", "tuan anh hoc snippets", "tuan nang doc snippets", "quan anh doc snippets", "tran anh doc snippets", "luan anh doc 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: (((("tuan anh doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tuan anh doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tuan anh doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tuan anh doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.