Perhaps you should try some spelling variations:
"co sai ky thuat chuong dung trong marketing" » "co sai ky thuat chuong dung tri marketing", "co sai ky thuat cong dung trong marketing", "co sai ky thuat song dung trong marketing", "co sai ky thuat trong dung trong marketing", "co sai ky thuat chuong duong trong marketing", "co sai ky thuat cuong dung trong marketing", "co sai ky thuat phuong dung trong marketing", "co dai ky thuat chuong dung trong marketing", "co gai ky thuat chuong dung trong marketing", "co hai ky thuat chuong dung trong marketing", "co sac ky thuat chuong dung trong marketing"
"co sach ty thuat hung dung tvqg marketing" » "co sach ty thuat hung dung tri marketing", "co sach ty thuat dung dung tvqg marketing", "co sach ty thuat ung dung tvqg marketing", "co sach ty thuat xung dung tvqg marketing", "co sach ty thuat nhung dung tvqg marketing", "co sach ty thuat phung dung tvqg marketing", "co sach ty thuat hung dung tong marketing", "co sach my thuat hung dung tvqg marketing", "co sach te thuat hung dung tvqg marketing", "co sach thu thuat hung dung tvqg marketing", "bo sach ty thuat hung dung tvqg marketing", "cuon sach ty thuat hung dung tvqg marketing", "hoc sach ty thuat hung dung tvqg marketing", "co sach y thuat hung dung tvqg marketing", "co sach tu thuat hung dung tvqg marketing"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("co sai ky thuat chuong dung trong marketing") or ("co sach ty thuat hung dung tvqg marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("co sai ky thuat chuong dung trong marketing") OR ("co sach ty thuat hung dung tvqg marketing")).
• Removing quotes may allow a broader search: (( co sai ky thuat chuong dung trong marketing ) or ( co sach ty thuat hung dung tvqg marketing )).
• Adding a wildcard symbol may retrieve word variants: (("co sai ky thuat chuong dung trong marketing") or ("co sach ty thuat hung dung tvqg marketing"))*.