Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
hanh trinh » canh tranh, hanh chinh
tieu xanh » tieu danh, chieu xanh, dieu hanh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - hanh trinh cua nhung huong dan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - hanh trinh cua nhung huong dan ((toan cau) OR (toan cao))*.