Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
nhung cong » dung cong, thong cong, hang cong
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » manh cua
doanh cua » doanh luan
cong tac » cong ty
toan cau » toan cao, toan tap, 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 thien thanh - hanh ((tranh cua) or (doanh cua)) nhung cong tac ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thien thanh - hanh ((tranh cua) OR (doanh cua)) nhung cong tac ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - hanh ((tranh cua) or (doanh cua)) nhung cong tac ((toan cau) or (toan ban))*.