Perhaps you should try some spelling variations:
nhung tuong » nhung huong, nhung phuong, hung vuong
thuyet tach » thuyet mach, thuyet hach, thuyet xac
hoc thuyet » hoc chuyen
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
tuong dan » huong dan, tung dan, xuong dan
toan cau » toan cao, 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 thuyet tach - hanh trinh cua nhung tuong dan ((((toan cau) or (toan ban))) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet tach - hanh trinh cua nhung tuong dan ((((toan cau) OR (toan ban))) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: hoc thuyet tach - hanh trinh cua nhung tuong dan ((((toan cau) or (toan ban))) or (toan tap))*.