Perhaps you should try some spelling variations:
"python using java slippers" » "python using data slippers", "python using java slippery"
"cac dan hanh grippers" » "cac dang hanh grippers", "cac dan khanh grippers", "cac dan thanh 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: (((("cac dan hanh grippers") or ("python using java slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac dan hanh grippers") OR ("python using java slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac dan hanh grippers ) or ( python using java slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac dan hanh grippers") or ("python using java slippers"))) or ("locating bug code snippets"))*.