Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tho viet voi snippets" » "thon viet voi snippets", "thong viet voi snippets", "hoc viet voi snippets", "tho viec voi snippets", "tho viet doi snippets", "tho viet duoi 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: (((("tho viet 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: (((("tho viet voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tho viet voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tho viet voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.