Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van minh vi slippers" » "van minh voi slippers", "van dinh vi slippers", "van minh va slippers", "van minh vi slippery", "van minh vi grippers"
"locating bug code snippets" » "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: (((("van minh vi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van minh vi slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van minh vi slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van minh vi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.