Perhaps you should try some spelling variations:
"dung dat data snippets" » "dung fast data snippets", "dung dat dai snippets", "dung a data snippets", "dung va data snippets", "dung tai data snippets"
"cong trinh java slippers" » "cong trinh java slippery", "cong trinh java grippers"
"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: (((("cong trinh java slippers") or ("dung dat data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong trinh java slippers") OR ("dung dat data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong trinh java slippers ) or ( dung dat data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong trinh java slippers") or ("dung dat data snippets"))) or ("locating bug code snippets"))*.