Perhaps you should try some spelling variations:
"tam thieu cac snippets" » "tam chieu cac snippets", "giam thieu cac snippets", "toc thieu cac snippets", "tam hieu cac snippets", "tam thien cac snippets", "tam hieu ca snippets"
"dung java java snippets" » "dung va java 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: (((("tam thieu cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tam thieu cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tam thieu cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tam thieu cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.