Perhaps you should try some spelling variations:
"cho viec sio2 snippets" » "cho viec so snippets", "cho sic sio2 snippets", "cho viec gio snippets", "cuoi viec sio2 snippets", "co viet sio2 snippets", "tho viet sio2 snippets", "cho viec sio2 slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "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 sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho viec sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho viec sio2 snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho viec sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.