Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
doi chieu » doc hieu, doi chi, mot chieu
dang cong » dung cong
ho chieu » hoc thieu, mot chieu, thi chieu
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap
anh son » anh dong, tinh son
son cua » song cua, con cua, san cua

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))) or (theo chieu)) sach - anh son cua dang cong tan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((ho chieu) OR (doi chieu))) OR (theo chieu)) sach - anh son cua dang cong tan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((ho chieu) OR (doi chieu))) or (theo chieu)) sach - anh son cua dang cong tan toan cau".
• Adding a wildcard symbol may retrieve word variants: ((((ho chieu) OR (doi chieu))) or (theo chieu)) sach - anh son cua dang cong tan toan cau*.