Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hap dan moi snippets" » "hat dan moi snippets", "hai dan moi snippets", "ham dan moi snippets", "hap ban moi snippets", "hap dai moi snippets", "hap dan hoi 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: (((("hap dan 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: (((("hap dan moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hap dan moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hap dan moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.