Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan vu hoi snippets" » "nhan su hoi snippets", "nhan va hoi snippets", "nhat vu hoi snippets", "nhan vu khoi snippets", "nhan vu hai 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: (((("nhan vu 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: (((("nhan vu hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan vu hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan vu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.