Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ham rong du snippets" » "pham trong du snippets", "pham cong du snippets", "nam trong du snippets", "ham mong du snippets", "ham song du snippets", "ham trong dau 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 rong du 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 rong du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ham rong du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ham rong du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.