Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"chung ta hon snippets" » "chung tu hon snippets", "chung cu hon snippets", "chung vi hon snippets", "chung tam hon snippets", "chung ca hon snippets", "chung ta con 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 ("chung ta hon snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("chung ta hon snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( chung ta hon snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("chung ta hon snippets"))) or ("locating bug code snippets"))*.