Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
anh tang » anh bang, anh dang, anh nang
cong tan » cong tac, cong san, cong thanh
tran cao » toan cao, tran chau, trang cho
tang va » trang va, tang van, thang va
va dung » van dung, va duong, vat dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) or (doi chieu)) sach - anh tang va dung cong tan tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (doi chieu)) sach - anh tang va dung cong tan tran cao.
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (doi chieu)) sach - anh tang va dung cong tan tran cao*.