Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
hoc chieu » hoc thieu, ho chieu, hoc hien
trinh cua » tinh cua, trinh luat, trinh quan
tong cong » trong cong, cong cong, dang cong
dung cong » dung trong
dan chan » dan gian, dan ca, van chat
chan ban » can ban, chat ban, chan nan

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 cua ((tong cong) or (dung cong)) dan chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sach - hanh trinh cua ((tong cong) OR (dung cong)) dan chan ban.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sach - hanh trinh cua ((tong cong) or (dung cong)) dan chan ban*.