Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van lu danh slippers" » "van le danh slippers", "van lu hanh slippers", "van cu danh slippers", "van luc danh slippers", "van du danh slippers", "van lu danh slippery", "van lu 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 lu 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 lu danh slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van lu danh slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van lu danh slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.