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