Perhaps you should try some spelling variations:
"python using java slippers" » "python using data slippers", "python using java slippery", "python using java grippers"
"van cac thanh lieu" » "van cac thanh liem", "van cac thanh thieu", "van cac thanh vien", "van bac thanh lieu", "van cach nhanh lieu", "van ban thanh lieu", "van hac thanh lieu", "van cau thanh lieu"
"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: (((("python using java slippers") or ("van cac thanh lieu"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java slippers") OR ("van cac thanh lieu"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java slippers ) or ( van cac thanh lieu ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java slippers") or ("van cac thanh lieu"))) or ("locating bug code snippets"))*.