Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao minh doc snippets" » "cao minh doc snippets", "van minh doc snippets", "duc minh doc snippets", "dao minh duc snippets", "dao dinh doc snippets", "dao minh loc 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: (((("dao minh doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao minh doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao minh doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao minh doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.