Perhaps you should try some spelling variations:
"tran hung van slippers" » "tran hong van slippers", "tran quang van slippers", "tran hoang van slippers", "tran phung van slippers", "tran nhung van slippers", "tran dung van slippers", "tran hung van slippery", "tran hung van grippers"
"dung java java snippets" » "dung va java snippets"
"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: (((("tran hung van slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran hung van slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran hung van slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran hung van slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.