Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"luan anh robot slippers" » "luan a robot slippers", "luan danh robot slippers", "tuan anh robot slippers", "lan anh robot slippers", "luan anh robot slippery", "luan anh robot grippers"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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: (((("using java code snippets") or ("luan anh robot slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("luan anh robot slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( luan anh robot slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("luan anh robot slippers"))) or ("locating bug code snippets"))*.