Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son quang ca snippets" » "don quang ca snippets", "soi quang ca snippets", "doan quang ca snippets", "son quang cao snippets", "son quang cua snippets", "son quang cu 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: (((("son quang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("son quang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son quang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son quang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.