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