Perhaps you should try some spelling variations:
"python using java grippers" » "python using data grippers", "python using java slippers"
"thi anh viet slippery" » "thi hanh viet slippery", "thi thanh viet slippery", "thich anh viet slippery", "thi anh viet slippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets", "locating bug code slippers"

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: (((("thi anh viet slippery") or ("python using java grippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi anh viet slippery") OR ("python using java grippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi anh viet slippery ) or ( python using java grippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi anh viet slippery") or ("python using java grippers"))) or ("locating bug code snippets"))*.