Perhaps you should try some spelling variations:
"doc hanh phan snippets" » "doc thanh phan snippets", "doc anh phan snippets", "doc hanh han snippets", "hoc hanh phan snippets", "duc hanh phan snippets", "doi hanh phan snippets", "doc hanh phan slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("python using a snippets") or ("doc hanh phan snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("doc hanh phan snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( doc hanh phan snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") or ("doc hanh phan snippets"))) or ("locating bug code snippets"))*.