Perhaps you should try some spelling variations:
"tac thuoc java slippers" » "tac thuoc va slippers", "tao thuoc java slippers", "truc thuoc java slippers", "tac thuong java slippers", "tac thuoc java slippery", "tac thuoc java grippers"
"using java java snippets" » "using data 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 thuoc java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tac thuoc java slippers") OR ("using java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac thuoc java slippers ) or ( using java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac thuoc java slippers") or ("using java java snippets"))) or ("locating bug code snippets"))*.