Perhaps you should try some spelling variations:
canh manh » lanh manh, canh tranh, cach mang
hoc tien » hoc tieng, hoc vien, hoc tren
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 tien) OR (hoc hien)) manh - canh manh cua han tong dan ((phan cau) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc tien) OR (hoc hien)) manh - canh manh cua han tong dan ((phan cau) or (phan dau))~".
• Adding a wildcard symbol may retrieve word variants: ((hoc tien) OR (hoc hien)) manh - canh manh cua han tong dan ((phan cau) or (phan dau))*.