Perhaps you should try some spelling variations:
"cong lang tranh slippers" » "cong lan tranh slippers", "cong lang thanh slippers", "cong lanh tranh slippers", "cong vang tranh slippers", "cong luong tranh slippers", "cong quang tranh slippers", "cong lang tranh slippery", "cong lang tranh 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: (((("dung java java snippets") or ("cong lang tranh slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("cong lang tranh slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( cong lang tranh slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("cong lang tranh slippers"))) or ("locating bug code snippets"))*.