Perhaps you should try some spelling variations:
"thi hanh java snippets" » "thi hanh va snippets", "thi thanh java snippets", "thi hanh java slippers"
"dung lua code snippets" » "dung luan code snippets", "dung luat code snippets", "dung cua code snippets", "dung lbm code snippets", "dung lua code slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("thi hanh java snippets") or ("dung lua code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi hanh java snippets") OR ("dung lua code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi hanh java snippets ) or ( dung lua code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi hanh java snippets") or ("dung lua code snippets"))) or ("locating bug code snippets"))*.