Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
trinh han » trinh quan
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
han dung » chan dung, han duong, hanh dung
tan toan » tap toan, van toan, dan 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 chiet tach - hanh trinh han dung cong ((tan toan) or (tan tran)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh han dung cong ((tan toan) OR (tan tran)) cau*.