Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chiet tach » chieu sach
trinh quan » tinh quang, trinh luat, trinh han
quan nhung » qua nhung, cua nhung, luan chung
hieu lang » chieu sang, hieu quang, nhieu tang
nhung don » nhung van, nhung bo
don tinh » doan tinh, dong tinh, den tinh
toan cao » toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chiet tach)) - hanh trinh quan nhung don tinh toan cao~.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (chiet tach)) - hanh trinh quan nhung don tinh toan cao*.