Perhaps you should try some spelling variations:
thanh trung » thanh tung
phuong doan » phuong loan, phuong hoang, huong dan
phuong dan » phuong danh, huong dan, phuong lan
doi chieu » doc hieu, doi chi, mot chieu
trung cap » truong cao, trung tam
ho chieu » theo chieu, hoc thieu, mot chieu
cap dung » ap dung, cao dung, chan dung
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) OR (ho chieu)) sach - thanh trung cap dung ((phuong dan) or (phuong doan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (ho chieu)) sach - thanh trung cap dung ((phuong dan) OR (phuong doan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) OR (ho chieu)) sach - thanh trung cap dung ((phuong dan) or (phuong doan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) OR (ho chieu)) sach - thanh trung cap dung ((phuong dan) or (phuong doan)) toan cao*.