Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
dang cong » dung cong
nhan tao » nhan dan
nhan tai » hang tai, van tai, toan tai
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - hanh ((nhan tao) or (nhan tai)) dang cong tan toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - hanh ((nhan tao) OR (nhan tai)) dang cong tan toan cao.
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - hanh ((nhan tao) or (nhan tai)) dang cong tan toan cao*.