Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"nhung cau doc snippets" » "chung cu doc snippets", "nhung bai doc snippets", "nhu cau doc snippets", "nhung chau doc snippets", "nhung cau do snippets", "nhung cau doi snippets"
"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 ("nhung cau doc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("nhung cau doc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( nhung cau doc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("nhung cau doc snippets"))) or ("locating bug code snippets"))*.