Perhaps you should try some spelling variations:
"using java caicore snippets" » "using data caicore snippets"
"dung cac so snippets" » "luong cac so snippets", "dung cho so snippets", "dung tai so snippets", "dung cac co snippets", "dung cac bo snippets", "dung cac ho 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: (((("using java caicore snippets") or ("dung cac so snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java caicore snippets") OR ("dung cac so snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java caicore snippets ) or ( dung cac so snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java caicore snippets") or ("dung cac so snippets"))) or ("locating bug code snippets"))*.