Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao hieu mot snippets" » "cao hieu mot snippets", "van hieu mot snippets", "bao hiem mot snippets", "dao thieu mot snippets", "dao hieu moi snippets", "dao hieu so 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: (((("dao hieu mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao hieu mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao hieu mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao hieu mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.