Perhaps you should try some spelling variations:
"tac xuan trinh slippers" » "tac qua trinh slippers", "tac xuan dinh slippers", "tac xuan kinh slippers", "tac quan trinh slippers", "dac xuan trinh slippers", "tai xuan trinh slippers", "tac xuan trinh slippery", "tac xuan trinh 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: (((("tac xuan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tac xuan trinh slippers") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac xuan trinh slippers ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac xuan trinh slippers") or ("dung java java snippets"))) or ("locating bug code snippets"))*.