Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu minh doc snippets" » "thi minh doc snippets", "chi minh doc snippets", "vu minh doc snippets", "thu minh duc snippets", "thu dinh doc snippets", "thu 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: (((("thu 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: (((("thu minh doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu minh doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu minh doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.