Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac cuu hoi snippets" » "cap cuu hoi snippets", "cac cau hoi snippets", "cac chu hoi snippets", "cac cua hoi snippets", "cac cuu hoc 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: (((("cac cuu 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: (((("cac cuu hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac cuu hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac cuu hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.