Perhaps you should try some spelling variations:
chau tinh » cuu tinh, cua tinh, cac tinh
toan tuan » tran tuan, toan quan, doan tuan
tuan nang » luan nang, xuan nang, tuan bang
nang cong » nang song, dang cong, bang cong
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
ha tinh » va tinh, may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chau tinh) or (ha tinh)) - tinh toan tuan nang cong tac ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chau tinh) OR (ha tinh)) - tinh toan tuan nang cong tac ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo ((chau tinh) or (ha tinh)) - tinh toan tuan nang cong tac ((toan cau) or (toan cao))*.