Perhaps you should try some spelling variations:
tien manh » tien anh, tien thanh, tieng anh
tranh cua » manh cua
doanh cua » doanh luan
dung cong » dung trong
hoc tien » hoc tieng, hoc hien, hoc vien
cong dan » cong san, cong tan, huong dan
chan cau » phan cau, can cau, chinh cau
chinh ca » chinh ta, chinh va, chinh tai

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc tien manh - canh ((tranh cua) or (doanh cua)) dung cong dan ((chan cau) or (chinh ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc tien manh - canh ((tranh cua) OR (doanh cua)) dung cong dan ((chan cau) OR (chinh ca)).
• Adding a wildcard symbol may retrieve word variants: hoc tien manh - canh ((tranh cua) or (doanh cua)) dung cong dan ((chan cau) or (chinh ca))*.