Perhaps you should try some spelling variations:
trinh thuat » trinh luat, trinh thiet, trinh thuc
hanh trinh » canh tranh, hanh chinh
chieu sang » chieu sach, chieu xanh, hieu lang
thuat xung » thuat dung, thuat hung, thuat ung
xung huong » dung huong, dung thuong, dung phuong
hieu manh » chieu xanh, hieu nganh, dieu hanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 manh) OR (chieu sang)) - hanh trinh thuat xung huong dan ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) or (chieu sang)) - hanh trinh thuat xung huong dan ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sang)) - hanh trinh thuat xung huong dan ((toan cau) OR (toan ban))*.