Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ham so dong snippets" » "ham co dong snippets", "ham o dong snippets", "ham so dung snippets", "nam so dong snippets", "cham soc dong 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: (((("ham so dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ham so dong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ham so dong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ham so dong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.