Perhaps you should try some spelling variations:
"bo sac ky thuat nang quan trong marketing" » "bo sac ky thuat nang quan tvqg marketing", "bo sac ky thuat bang quan trong marketing", "bo sac ky thuat mang quan trong marketing", "bo sac ky thuat trang quan trong marketing", "bo sac ky thuat nang gian trong marketing", "bo sac ky thuat ban quan trong marketing", "bo sac ky thuat nang suat trong marketing", "bo cac ky thuat nang quan trong marketing", "bo sai ky thuat nang quan trong marketing"
"bo sach dao thuat dung cong tri marketing" » "bo sach dao thuat dung cong tvqg marketing", "bo sach dao thuat dung cong _ marketing", "bo sach dao thuat dung cong cuu marketing", "bo sach dao thuat hung cong tri marketing", "bo sach dao thuat ung cong tri marketing", "bo sach dao thuat xung cong tri marketing", "bo sach dao phat dung cong tri marketing", "bo sach va thuat dung cong tri marketing", "bo sach cac thuat dung cong tri marketing", "bo sach dao thuat dung trong tri marketing", "bo lanh dao thuat dung cong tri marketing", "bo sach dao thuat dung cong ti marketing", "bo sach dao thuat dung dong tri marketing", "bo sach dao thuat dung cong tai marketing", "co sach dao thuat dung cong tri marketing", "hoc sach dao thuat dung cong tri marketing"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("bo sac ky thuat nang quan trong marketing") or ("bo sach dao thuat dung cong tri marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sac ky thuat nang quan trong marketing") OR ("bo sach dao thuat dung cong tri marketing"))*.
• Removing quotes may allow a broader search: (( bo sac ky thuat nang quan trong marketing ) or ( bo sach dao thuat dung cong tri marketing ))*.