Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"thon thoi cuc snippets" » "tho thoi cuc snippets", "ton thoi cuc snippets", "trong thoi cuc snippets", "thon thi cuc snippets", "thon thoai cac snippets", "thon thuoc cuc 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 ("thon thoi cuc snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("thon thoi cuc snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( thon thoi cuc snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("thon thoi cuc snippets"))) or ("locating bug code snippets"))*.