Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tai viet doc snippets" » "thi viet doc snippets", "mai viet doc snippets", "tai lieu doc snippets", "tai viet duc snippets", "tai viet goc snippets", "tai 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: (((("tai viet doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tai viet doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tai viet doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tai viet doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.