Perhaps you should try some spelling variations:
"kim nhung van snippets" » "kim dung van snippets", "cam nhung van snippets", "kim huong van snippets", "kim phung van snippets", "kim nhung bai snippets", "kim nhung cau snippets", "kim nhung van slippers"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw snippets", "python using sat 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: (((("kim nhung van snippets") or ("python using sat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("kim nhung van snippets") OR ("python using sat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( kim nhung van snippets ) or ( python using sat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("kim nhung van snippets") or ("python using sat snippets"))) or ("locating bug code snippets"))*.