Perhaps you should try some spelling variations:
hoang tuong » hoang vuong, hoang trong, hoang tung
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
trinh tuan » trinh quan, trinh toan, trinh luan
tuan hoang » quan hoang, tran hoang, xuan hoang
ho chieu » theo chieu, hoc thieu, doi chieu
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - hanh trinh tuan hoang tuong ((tac toan) or (tap toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh trinh tuan hoang tuong ((tac toan) OR (tap toan)) cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh trinh tuan hoang tuong ((tac toan) or (tap toan)) cao*.