Perhaps you should try some spelling variations:
"thi minh java snippets" » "thi trinh java snippets", "thi minh va snippets", "chi minh java snippets", "thi hanh java snippets", "thi bich java snippets", "thi minh 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 minh 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 minh java snippets") OR ("dung lua code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi minh java snippets ) or ( dung lua code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi minh java snippets") or ("dung lua code snippets"))) or ("locating bug code snippets"))*.