Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"dung van 1 slippers" » "duong van 1 slippers", "dung va 1 slippers", "dang van 1 slippers", "dung van _ slippers", "dung ban 1 slippers", "dung han 1 slippers", "dung van 1 slippery", "dung van 1 grippers"

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: (((("dung van 1 slippers") or ("python using java snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung van 1 slippers") OR ("python using java snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( dung van 1 slippers ) or ( python using java snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung van 1 slippers") or ("python using java snippets"))) or ("locating bugs code snippets"))*.