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