Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh phan » trinh han, trinh quan, thanh phan
toc chieu » toc thieu, doc hieu, hoc thieu
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
dan tocn » dan toan, dang toan, dan hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc chieu sach - hanh trinh phan dung cong ((dan tocn) or (dan toc)) bi~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc chieu sach - hanh trinh phan dung cong ((dan tocn) OR (dan toc)) bi*.