Perhaps you should try some spelling variations:
"dong qua java snippets" » "duong qua java snippets", "dong cua java snippets", "dong mua java snippets", "dong qua va snippets"
"dung cho cong snippets" » "dung cao cong snippets", "dung cua cong snippets", "dung cac cong 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: (((("dong qua java snippets") or ("dung cho cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong qua java snippets") OR ("dung cho cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong qua java snippets ) or ( dung cho cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong qua java snippets") or ("dung cho cong snippets"))) or ("locating bug code snippets"))*.