Perhaps you should try some spelling variations:
"bo sach ty thuat xung dung trong marketing" » "bo sach ty thuat xung dung tri marketing", "bo sach ty thuat xung dung tvqg marketing", "bo sach ty thuat dung dung trong marketing", "bo sach ty thuat hung dung trong marketing", "bo sach ty thuat ung dung trong marketing", "bo sach ty thuat cung dung trong marketing", "bo sach my thuat xung dung trong marketing", "bo sach te thuat xung dung trong marketing", "bo sach thu thuat xung dung trong marketing", "co sach ty thuat xung dung trong marketing", "hoc sach ty thuat xung dung trong marketing", "bo sach y thuat xung dung trong marketing", "bo sach tu thuat xung dung trong marketing"
"co cac ky thuat xung dung trong marketing" » "co cac ky thuat xung dung tri marketing", "co cac ky thuat xung dung tvqg marketing", "co cac ky thuat dung dung trong marketing", "co cac ky thuat hung dung trong marketing", "co cac ky thuat ung dung trong marketing", "co cac ky thuat cung dung trong marketing", "cho cac ky thuat xung dung trong marketing", "ca cac ky thuat xung dung trong marketing", "co cau ky thuat xung dung trong 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 ty thuat xung dung trong marketing") or ("co cac ky thuat xung dung trong marketing"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("bo sach ty thuat xung dung trong marketing") OR ("co cac ky thuat xung dung trong marketing")).
• Removing quotes may allow a broader search: (( bo sach ty thuat xung dung trong marketing ) or ( co cac ky thuat xung dung trong marketing )).
• Adding a wildcard symbol may retrieve word variants: (("bo sach ty thuat xung dung trong marketing") or ("co cac ky thuat xung dung trong marketing"))*.