Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hat chau voi snippets" » "ha chau voi snippets", "lai chau voi snippets", "hat nhan voi snippets", "hat cham voi snippets", "hat chau phi snippets", "hat chau van 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: (((("hat chau voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hat chau voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hat chau voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hat chau voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.