Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van su danh slippers" » "van sau danh slippers", "van su doanh slippers", "van su dang slippers", "dan su danh slippers", "van su danh slippery", "van su danh 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 su danh 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 su danh slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van su danh slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van su danh slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.