Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thu muc hoi snippets" » "thu tuc hoi snippets", "thu duc hoi snippets", "thu quoc hoi snippets", "thu phuc hoi snippets", "thu duoc 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: (((("thu muc hoi 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 muc hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thu muc hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thu muc hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.