Perhaps you should try some spelling variations:
dang nguong » dung nguon, dang thuong, tang nguon
hoc thuyet » hoc chuyen
thuyet anh » thuyet kinh, thuy anh, thuyet dan
nguong dan » huong dan
canh manh » lanh manh, canh tranh, van manh
cua dang » cua cong, cua ban
phan cau » phan dau, phan cac, phan lap

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 anh - ((canh manh) or (cach mang)) cua dang nguong dan ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuyet anh - ((canh manh) OR (cach mang)) cua dang nguong dan ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: hoc thuyet anh - ((canh manh) or (cach mang)) cua dang nguong dan ((phan cau) or (phan tu))*.