Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
chiet tach » chieu sach
hieu lang » chieu sang, hieu quang, nhieu tang
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
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 cua nhung don tinh toan cao~.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (chiet tach)) - hanh trinh cua nhung don tinh toan cao*.