Perhaps you should try some spelling variations:
thanh tung » thanh cong
tuan duong » tuyen duong, tuong duong, van duong
duong cong » dung cong, luong cong, duong trong
doi chieu » doc hieu, doi chi, mot chieu
tung tuan » trung tuan, hung tuan, quang tuan
ho chieu » theo chieu, hoc thieu, mot chieu
dan toan » van toan, dan than, manh toan

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

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