Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che muon cua snippets" » "che mon cua snippets", "cho muong cua snippets", "che duoc cua snippets", "che muong cua snippets", "che vuon cua snippets", "che huong cua 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: (((("che muon cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che muon cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che muon cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che muon cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.