Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"hong anh cach snippets" » "hoang anh cach snippets", "hong hanh cach snippets", "dong anh cach snippets", "hong tinh cach snippets", "hong bang cach snippets", "hong minh cach 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: (((("hong anh cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hong anh cach snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hong anh cach snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hong anh cach snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.