Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
cong thanh » dong thanh, cong trinh, cong tan
thanh tran » thanh trang, thanh toan, thanh tra
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
hang vat » hang va, dang vat, cang vat
bang vat » bang va, dang vat, cang vat
tran cau » tran chau, toan cau, ran cau

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 (theo chieu)) sach - hanh ((hang vat) OR (bang vat)) dung cong thanh tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (theo chieu)) sach - hanh ((hang vat) OR (bang vat)) dung cong thanh tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (theo chieu)) sach - hanh ((hang vat) OR (bang vat)) dung cong thanh tran cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (theo chieu)) sach - hanh ((hang vat) OR (bang vat)) dung cong thanh tran cau*.