Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
khong cong » thong cong, khong cang, chong cong
cua khong » hua khong, cua phuong, cua thuong
ho chieu » hoc thieu, doi chieu, mot chieu
anh dung » anh dong, anh huong, sach dung
dung cua » dung luan, dung cho
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (theo chieu)) tinh - anh dung cua khong cong ((tan toan) OR (tap toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (theo chieu)) tinh - anh dung cua khong cong ((tan toan) OR (tap toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (theo chieu)) tinh - anh dung cua khong cong ((tan toan) OR (tap toan)) cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) or (theo chieu)) tinh - anh dung cua khong cong ((tan toan) OR (tap toan)) cao*.