Perhaps you should try some spelling variations:
chieu tinh » lieu tinh, chau tinh, kieu tinh
nhung cong » dung cong, thong cong, hang cong
dang cua » dung cua, dong cua, hang cua
mang cua » manh cua, dung cua, ban cua
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) or (trieu tinh)) - nhan ((dang cua) OR (mang cua)) nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu tinh) OR (trieu tinh)) - nhan ((dang cua) OR (mang cua)) nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu tinh) or (trieu tinh)) - nhan ((dang cua) OR (mang cua)) nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu tinh) or (trieu tinh)) - nhan ((dang cua) OR (mang cua)) nhung cong tac toan cau*.