Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
ho chieu » hoc thieu, doi chieu, mot chieu
cong tac » cong ty
tac tran » tan tran, tac trai, tac tren
tran tap » toan tap, tran tan, tran tuan
tung va » trung va, tuong va, dung va

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 (theo chieu)) sach - thanh tung va nhung cong tac tran tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (theo chieu)) sach - thanh tung va nhung cong tac tran tap".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (theo chieu)) sach - thanh tung va nhung cong tac tran tap*.