Perhaps you should try some spelling variations:
hoc tieng » hoc hien
canh manh » lanh manh, canh tranh, cach mang
manh cua » doanh cua, ban cua
tong dan » tuong dan, thong dan, trong dan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau
cua han » cua hang, cua nhan, cua phan

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: hoc tieng anh - canh manh cua han tong dan ((phan cau) OR (phan dau))~.
• Adding a wildcard symbol may retrieve word variants: hoc tieng anh - canh manh cua han tong dan ((phan cau) or (phan dau))*.