Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van han danh slippers" » "van van danh slippers", "van phan dang slippers", "van nhan dang slippers", "van hanh danh slippers", "van phan danh slippers", "van nhan danh slippers", "van han danh slippery", "van han danh grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("van han 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 han danh slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van han danh slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van han danh slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.