Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
quang dung » quang trung, ung dung, cuong dung
hoc chieu » hoc thieu, ho chieu, hoc hien
quan dung » quan duong, qua dung, quan dong
cong van » cong vang, cong san, song van
tuan cau » toan cau, quan cau, thuan cam
tuan cu » tuan tu, quan cua, tuan thu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sach - hanh trinh ((quan dung) OR (quang dung)) cong van ((tuan cau) or (tuan cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trinh ((quan dung) OR (quang dung)) cong van ((tuan cau) OR (tuan cu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chieu sach - hanh trinh ((quan dung) OR (quang dung)) cong van ((tuan cau) or (tuan cu))".
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh ((quan dung) OR (quang dung)) cong van ((tuan cau) or (tuan cu))*.