Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho viec de snippets" » "cuoi viec de snippets", "co viet de snippets", "tho viet de snippets", "cho viec dieu snippets", "cho viec dat snippets", "cho viec doc 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: (((("cho viec de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho viec de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho viec de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho viec de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.