Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien xanh » hien hanh, hien nhanh, chieu xanh
trinh cua » tinh cua, trinh luat, trinh quan
cua thong » cua thuong, cua khong, cua tong
tuong dan » tung dan, xuong dan, truong dai
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.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien xanh - hanh trinh cua thong ((tuong dan) or (huong dan)) ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien xanh - hanh trinh cua thong ((tuong dan) OR (huong dan)) ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hien xanh - hanh trinh cua thong ((tuong dan) or (huong dan)) ((toan cau) or (toan ban))*.