Perhaps you should try some spelling variations:
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
duong cong » dung cong, luong cong, duong trong
ho chiet » ho chieu, ho thiet, hoc thiet
trinh va » trinh van, trinh vat, trinh ve
va duong » van duong, va tuong, va huong
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap

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 duong cong dan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh trinh va duong cong dan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - hanh trinh va duong cong dan ((toan tai) or (toan cao))*.