Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
hoc thien » hoc hien, hoc thieu, hoc thiet
tranh cua » manh cua
doanh cua » doanh luan
hang cong » dang cong, hang nong, bang cong
cong dan » cong san, cong tan, huong dan
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)) hang cong dan ((toan tap) 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)) hang cong dan ((toan tap) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc thien thanh - hanh ((tranh cua) or (doanh cua)) hang cong dan ((toan tap) or (toan ban))*.