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