Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh tran » hanh trang, thanh tran, hanh tram
duc dung » duc hung, duc cuong, duc trung
do trung » bo truong, le trung
cong tac » cong ty
tac toan » tap toan, tam toan, hach toan
toan cau » 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 chieu tinh - hanh tran ((duc dung) or (do trung)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu tinh - hanh tran ((duc dung) OR (do trung)) cong tac toan cau*.