Perhaps you should try some spelling variations:
"quang doan code snippets" » "quan doan code snippets", "quang hoan code snippets", "quang hoang code snippets", "quang doan core snippets"
"dong java java slippers" » "dong va java slippers", "dong java java slippery", "dong java java grippers"
"locating bug code snippets" » "locating bug core snippets", "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: (((("dong java java slippers") or ("quang doan code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong java java slippers") OR ("quang doan code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong java java slippers ) or ( quang doan code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong java java slippers") or ("quang doan code snippets"))) or ("locating bug code snippets"))*.