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