Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
tuong cua » truong cua, huong cua, thong cua
tung cua » trung cua, dung cua, tang 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: ((doi chieu) or (hoc hien)) tinh - thanh ((tung cua) OR (tuong cua)) thong cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (hoc hien)) tinh - thanh ((tung cua) OR (tuong cua)) thong cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doi chieu) or (hoc hien)) tinh - thanh ((tung cua) OR (tuong cua)) thong cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (hoc hien)) tinh - thanh ((tung cua) OR (tuong cua)) thong cong tac toan cau*.