Perhaps you should try some spelling variations:
"bo cac ky thuat nhung dung trong marketing" » "bo cac ky thuat nhung dung tri marketing", "bo cac ky thuat chung dung trong marketing", "bo cac ky thuat chuong dung trong marketing", "bo cac ky thuat dung dung trong marketing", "bo cac ky thuat phuong dung trong marketing", "bo cac ky thuat ung dung trong marketing", "bo cac ky thuat thong dung trong marketing", "bo cac ky thuat nphung dung trong marketing", "bo cac ky thuat nung dung trong marketing", "bo cac ky thuat ndung dung trong marketing", "bo cau ky thuat nhung dung trong marketing", "o cac ky thuat nhung dung trong marketing", "co cac ky thuat nhung dung trong marketing"
"bo bach mai thuat hung dung tvqg marketing" » "bo bach mai thuat hung dung tri marketing", "bo bach mai thuat dung dung tvqg marketing", "bo bach mai thuat ung dung tvqg marketing", "bo bach mai thuat xung dung tvqg marketing", "bo bach mi thuat hung dung tvqg marketing", "bo bach ma thuat hung dung tvqg marketing", "bo bach giai thuat hung dung tvqg marketing", "bo bach mai thuat phung dung tvqg marketing", "bo bach mai thuat hung dung tong marketing", "bo sach mai thuat hung dung tvqg marketing", "bo trach mai thuat hung dung tvqg marketing", "noi bach mai thuat hung dung tvqg marketing"

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: (("bo cac ky thuat nhung dung trong marketing") or ("bo bach mai thuat hung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo cac ky thuat nhung dung trong marketing") OR ("bo bach mai thuat hung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( bo cac ky thuat nhung dung trong marketing ) or ( bo bach mai thuat hung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo cac ky thuat nhung dung trong marketing") or ("bo bach mai thuat hung dung tvqg marketing"))*.