Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chon tu voi snippets" » "con tu voi snippets", "cho tu voi snippets", "choi tu voi snippets", "chon tu doi snippets", "chon su voi snippets", "chon tu loi 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: (((("chon tu voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chon tu voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chon tu voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chon tu voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.