Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don va moi snippets" » "doan va moi snippets", "dong va moi snippets", "don vi moi snippets", "don va mot snippets", "don ve moi snippets", "don va mo 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: (((("don va moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don va moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don va moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don va moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.