Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
lang cong » dang cong, bang cong, hang cong
ho chiet » ho chieu, ho thiet, hoc thiet
trinh va » trinh van, trinh vat, trinh ve
va lang » va nang, hoa lang
van tan » van tuan, van ban, van tai

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 va lang cong ((van tan) or (tinh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh va lang cong ((van tan) OR (tinh toan)) cau*.