Perhaps you should try some spelling variations:
"truan don tinh slippers" » "truan doi tinh slippers", "thuat don tinh slippers", "tran doan tinh slippers", "truan doan tinh slippers", "truan dong tinh slippers", "truan den tinh slippers", "truan don tinh slippery", "truan don tinh 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: (((("truan don tinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("truan don tinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truan don tinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truan don tinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.