Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh dung » thanh dung, anh dung, hanh dong
cua khong » cua phuong, cua thuong, cua cong
hua khong » hoa khong, hoac khong, phuc khong
ho chieu » theo chieu, hoc thieu, doi chieu
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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