Perhaps you should try some spelling variations:
"bo sach ky thuat cuong dung trong marketing" » "bo sach ky thuat cuong dung tvqg marketing", "bo sach ky thuat chuong dung trong marketing", "bo sach ky thuat cong dung trong marketing", "bo sach ky thuat tuong dung trong marketing", "bo sach ky thuat tuong duong trong marketing", "bo sach ky thuat ung dung trong marketing", "bo sach ky thuat thong dung trong marketing", "co sach ky thuat cuong dung trong marketing", "hoc sach ky thuat cuong dung trong marketing", "bo sac ky thuat cuong dung trong marketing", "bo sach y thuat cuong dung trong marketing", "bo sach ty thuat cuong dung trong marketing"
"co cac ky thuat dung dung tri marketing" » "co cac ky thuat dung dung tvqg marketing", "co cac ky thuat dung dung _ marketing", "co cac ky thuat dung dung cuu marketing", "co cac ky thuat hung dung tri marketing", "co cac ky thuat ung dung tri marketing", "co cac ky thuat xung dung tri marketing", "co cac ky thuat dung ung tri marketing", "co cac ky thuat dung dong tri marketing", "co cac ky thuat dung dung tai marketing", "co cac ky thuat dung dung tren marketing", "co cac ky thuat dung dung sai marketing", "cho cac ky thuat dung dung tri marketing", "ca cac ky thuat dung dung tri marketing", "co cau ky thuat dung dung tri 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 sach ky thuat cuong dung trong marketing") or ("co cac ky thuat dung dung tri marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach ky thuat cuong dung trong marketing") OR ("co cac ky thuat dung dung tri marketing")).
• Removing quotes may allow a broader search: (( bo sach ky thuat cuong dung trong marketing ) or ( co cac ky thuat dung dung tri marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach ky thuat cuong dung trong marketing") or ("co cac ky thuat dung dung tri marketing"))*.