Perhaps you should try some spelling variations:
hanh truong » hanh trong, anh truong, manh truong
truong tac » tuong tac, truong tai, trong tac
chong cong » cong cong, thong cong, cuong cong
thi chieu » thi chien, thi hieu, theo chieu
tac chong » cac chuong, cac cong, cac chung
manh toan » thanh toan, anh tuan, tinh toan
ho chieu » theo chieu, hoc thieu, doi chieu
van tan » van tuan, van ban, van tai

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 (thi chieu)) sach - hanh truong tac chong cong ((manh toan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (thi chieu)) sach - hanh truong tac chong cong ((manh toan) OR (van tan)) cau.
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (thi chieu)) sach - hanh truong tac chong cong ((manh toan) or (van tan)) cau*.