Perhaps you should try some spelling variations:
cua thuong » cua truong, cua phuong, ca thuong
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh dong » anh dong, ha dong
cua khong » hua khong, cua phuong, cua cong
ho chieu » theo chieu, hoc thieu, doi chieu
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 tinh - hanh dong ((cua khong) or (cua thuong)) cong ((tan toan) OR (tap toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu tinh - hanh dong ((cua khong) OR (cua thuong)) cong ((tan toan) OR (tap toan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu tinh - hanh dong ((cua khong) or (cua thuong)) cong ((tan toan) OR (tap toan)) tap".
• Adding a wildcard symbol may retrieve word variants: ho chieu tinh - hanh dong ((cua khong) or (cua thuong)) cong ((tan toan) OR (tap toan)) tap*.